chore: Update discovery artifacts (#1375)

## Deleted keys were detected in the following stable discovery artifacts:
servicenetworking v1 https://github.com/googleapis/google-api-python-client/commit/c0ad756013c602597e477bc0e22e7b2771689214

## Deleted keys were detected in the following pre-stable discovery artifacts:
retail v2alpha https://github.com/googleapis/google-api-python-client/commit/c9d7a149295d827110c789e464b4f97edc13cbaa
servicenetworking v1beta https://github.com/googleapis/google-api-python-client/commit/c0ad756013c602597e477bc0e22e7b2771689214

## Discovery Artifact Change Summary:
feat(composer): update the api https://github.com/googleapis/google-api-python-client/commit/c2cb2746320fa7b6c1536028794f53576c0f1ddd
feat(compute): update the api https://github.com/googleapis/google-api-python-client/commit/2cdcd0a21223a229e711778a3cf1b38c63521d96
feat(dfareporting): update the api https://github.com/googleapis/google-api-python-client/commit/73f7d790e1585322547fe7cb39c8f36e7b400121
feat(dialogflow): update the api https://github.com/googleapis/google-api-python-client/commit/8edd852f294eaccfa6a0e7288d54a2d751f53506
feat(retail): update the api https://github.com/googleapis/google-api-python-client/commit/c9d7a149295d827110c789e464b4f97edc13cbaa
feat(sasportal): update the api https://github.com/googleapis/google-api-python-client/commit/12683cabbf8deaf0a884147b98c30345786874a6
feat(servicenetworking): update the api https://github.com/googleapis/google-api-python-client/commit/c0ad756013c602597e477bc0e22e7b2771689214
diff --git a/docs/dyn/dialogflow_v3.projects.locations.agents.environments.continuousTestResults.html b/docs/dyn/dialogflow_v3.projects.locations.agents.environments.continuousTestResults.html
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+<html><body>
+<style>
+
+body, h1, h2, h3, div, span, p, pre, a {
+  margin: 0;
+  padding: 0;
+  border: 0;
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+  font-style: inherit;
+  font-size: 100%;
+  font-family: inherit;
+  vertical-align: baseline;
+}
+
+body {
+  font-size: 13px;
+  padding: 1em;
+}
+
+h1 {
+  font-size: 26px;
+  margin-bottom: 1em;
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+
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+  margin-bottom: 1em;
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+
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+  margin-bottom: 1em;
+  margin-top: 1em;
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+  font-family: Monaco, 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Lucida Console', monospace;
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+  font-family: Arial, sans serif;
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+
+h1, h2, h3 {
+  border-bottom: solid #CCC 1px;
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+
+.toc_element {
+  margin-top: 0.5em;
+}
+
+.firstline {
+  margin-left: 2 em;
+}
+
+.method  {
+  margin-top: 1em;
+  border: solid 1px #CCC;
+  padding: 1em;
+  background: #EEE;
+}
+
+.details {
+  font-weight: bold;
+  font-size: 14px;
+}
+
+</style>
+
+<h1><a href="dialogflow_v3.html">Dialogflow API</a> . <a href="dialogflow_v3.projects.html">projects</a> . <a href="dialogflow_v3.projects.locations.html">locations</a> . <a href="dialogflow_v3.projects.locations.agents.html">agents</a> . <a href="dialogflow_v3.projects.locations.agents.environments.html">environments</a> . <a href="dialogflow_v3.projects.locations.agents.environments.continuousTestResults.html">continuousTestResults</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="#close">close()</a></code></p>
+<p class="firstline">Close httplib2 connections.</p>
+<p class="toc_element">
+  <code><a href="#list">list(parent, pageSize=None, pageToken=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Fetches a list of continuous test results for a given environment.</p>
+<p class="toc_element">
+  <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
+<p class="firstline">Retrieves the next page of results.</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="close">close()</code>
+  <pre>Close httplib2 connections.</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(parent, pageSize=None, pageToken=None, x__xgafv=None)</code>
+  <pre>Fetches a list of continuous test results for a given environment.
+
+Args:
+  parent: string, Required. The environment to list results for. Format: `projects//locations//agents// environments/`. (required)
+  pageSize: integer, The maximum number of items to return in a single page. By default 100 and at most 1000.
+  pageToken: string, The next_page_token value returned from a previous list request.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # The response message for Environments.ListTestCaseResults.
+  &quot;continuousTestResults&quot;: [ # The list of continuous test results.
+    { # Represents a result from running a test case in an agent environment.
+      &quot;name&quot;: &quot;A String&quot;, # The resource name for the continuous test result. Format: `projects//locations//agents//environments//continuousTestResults/`.
+      &quot;result&quot;: &quot;A String&quot;, # The result of this continuous test run, i.e. whether all the tests in this continuous test run pass or not.
+      &quot;runTime&quot;: &quot;A String&quot;, # Time when the continuous testing run starts.
+      &quot;testCaseResults&quot;: [ # A list of individual test case results names in this continuous test run.
+        &quot;A String&quot;,
+      ],
+    },
+  ],
+  &quot;nextPageToken&quot;: &quot;A String&quot;, # Token to retrieve the next page of results, or empty if there are no more results in the list.
+}</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list_next">list_next(previous_request, previous_response)</code>
+  <pre>Retrieves the next page of results.
+
+Args:
+  previous_request: The request for the previous page. (required)
+  previous_response: The response from the request for the previous page. (required)
+
+Returns:
+  A request object that you can call &#x27;execute()&#x27; on to request the next
+  page. Returns None if there are no more items in the collection.
+    </pre>
+</div>
+
+</body></html>
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