chore: Update discovery artifacts (#1462)

## Deleted keys were detected in the following stable discovery artifacts:
sqladmin v1 https://github.com/googleapis/google-api-python-client/commit/cef24d829ab5be71563a2b668b8f6cf5dda2c8e4

## Deleted keys were detected in the following pre-stable discovery artifacts:
alertcenter v1beta1 https://github.com/googleapis/google-api-python-client/commit/70810a52c85c6d0d6f00d7afb41c8608261eaebc

## Discovery Artifact Change Summary:
feat(alertcenter): update the api https://github.com/googleapis/google-api-python-client/commit/70810a52c85c6d0d6f00d7afb41c8608261eaebc
feat(chat): update the api https://github.com/googleapis/google-api-python-client/commit/a577cd0b71951176bbf849c1f7f139127205da54
feat(cloudbuild): update the api https://github.com/googleapis/google-api-python-client/commit/9066056a8b106d441fb7686fe84359484d0d58bc
feat(content): update the api https://github.com/googleapis/google-api-python-client/commit/b123349da33c11c0172a8efb3fadef685a30e6e1
feat(displayvideo): update the api https://github.com/googleapis/google-api-python-client/commit/c525d726ee6cffdd4bc7afd69080d5e52bae83a0
feat(dns): update the api https://github.com/googleapis/google-api-python-client/commit/13436ccd2b835fda5cb86952ac4ea991ee8651d8
feat(eventarc): update the api https://github.com/googleapis/google-api-python-client/commit/6be3394a64a5eb509f68ef779680fd36837708ee
feat(file): update the api https://github.com/googleapis/google-api-python-client/commit/817a0e636771445a988ef479bd52740f754b901a
feat(monitoring): update the api https://github.com/googleapis/google-api-python-client/commit/bd32149f308467f0f659119587afc77dcec65b14
feat(people): update the api https://github.com/googleapis/google-api-python-client/commit/aa6b47df40c5289f33aef6fb6aa007df2d038e20
feat(retail): update the api https://github.com/googleapis/google-api-python-client/commit/d39f06e2d77034bc837604a41dd52c577f158bf2
feat(securitycenter): update the api https://github.com/googleapis/google-api-python-client/commit/999fab5178208639c9eef289f9f441052ed832fc
feat(speech): update the api https://github.com/googleapis/google-api-python-client/commit/3b2c0fa62b2a0c86bba1e97f1b18f93250dbd551
feat(sqladmin): update the api https://github.com/googleapis/google-api-python-client/commit/cef24d829ab5be71563a2b668b8f6cf5dda2c8e4
diff --git a/docs/dyn/sqladmin_v1.flags.html b/docs/dyn/sqladmin_v1.flags.html
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+<html><body>
+<style>
+
+body, h1, h2, h3, div, span, p, pre, a {
+  margin: 0;
+  padding: 0;
+  border: 0;
+  font-weight: inherit;
+  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;
+}
+
+h2 {
+  font-size: 24px;
+  margin-bottom: 1em;
+}
+
+h3 {
+  font-size: 20px;
+  margin-bottom: 1em;
+  margin-top: 1em;
+}
+
+pre, code {
+  line-height: 1.5;
+  font-family: Monaco, 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Lucida Console', monospace;
+}
+
+pre {
+  margin-top: 0.5em;
+}
+
+h1, h2, h3, p {
+  font-family: Arial, sans serif;
+}
+
+h1, h2, h3 {
+  border-bottom: solid #CCC 1px;
+}
+
+.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="sqladmin_v1.html">Cloud SQL Admin API</a> . <a href="sqladmin_v1.flags.html">flags</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(databaseVersion=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Lists all available database flags for Cloud SQL instances.</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(databaseVersion=None, x__xgafv=None)</code>
+  <pre>Lists all available database flags for Cloud SQL instances.
+
+Args:
+  databaseVersion: string, Database type and version you want to retrieve flags for. By default, this method returns flags for all database types and versions.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Flags list response.
+  &quot;items&quot;: [ # List of flags.
+    { # A flag resource.
+      &quot;allowedIntValues&quot;: [ # Use this field if only certain integers are accepted. Can be combined with min_value and max_value to add additional values.
+        &quot;A String&quot;,
+      ],
+      &quot;allowedStringValues&quot;: [ # For **STRING** flags, a list of strings that the value can be set to.
+        &quot;A String&quot;,
+      ],
+      &quot;appliesTo&quot;: [ # The database version this flag applies to. Can be **MYSQL_8_0**, **MYSQL_5_6**, or **MYSQL_5_7**.
+        &quot;A String&quot;,
+      ],
+      &quot;inBeta&quot;: True or False, # Whether or not the flag is considered in beta.
+      &quot;kind&quot;: &quot;A String&quot;, # This is always **sql#flag**.
+      &quot;maxValue&quot;: &quot;A String&quot;, # For **INTEGER** flags, the maximum allowed value.
+      &quot;minValue&quot;: &quot;A String&quot;, # For **INTEGER** flags, the minimum allowed value.
+      &quot;name&quot;: &quot;A String&quot;, # This is the name of the flag. Flag names always use underscores, not hyphens, for example: **max_allowed_packet**
+      &quot;requiresRestart&quot;: True or False, # Indicates whether changing this flag will trigger a database restart. Only applicable to Second Generation instances.
+      &quot;type&quot;: &quot;A String&quot;, # The type of the flag. Flags are typed to being **BOOLEAN**, **STRING**, **INTEGER** or **NONE**. **NONE** is used for flags which do not take a value, such as **skip_grant_tables**.
+    },
+  ],
+  &quot;kind&quot;: &quot;A String&quot;, # This is always **sql#flagsList**.
+}</pre>
+</div>
+
+</body></html>
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