chore: Update discovery artifacts (#1394)

## Deleted keys were detected in the following stable discovery artifacts:
bigquery v2 https://github.com/googleapis/google-api-python-client/commit/73965daab29cd6ae78004ede62f8c6c80f5587a3

## Discovery Artifact Change Summary:
feat(bigquery): update the api https://github.com/googleapis/google-api-python-client/commit/73965daab29cd6ae78004ede62f8c6c80f5587a3
feat(realtimebidding): update the api https://github.com/googleapis/google-api-python-client/commit/34d5d2606070b0c6fef053d6b88a65be085227b5
diff --git a/docs/dyn/container_v1beta1.projects.zones.clusters.html b/docs/dyn/container_v1beta1.projects.zones.clusters.html
index 98349d0..7fc8543 100644
--- a/docs/dyn/container_v1beta1.projects.zones.clusters.html
+++ b/docs/dyn/container_v1beta1.projects.zones.clusters.html
@@ -626,6 +626,10 @@
       },
     },
     "nodeIpv4CidrSize": 42, # [Output only] The size of the address space on each node for hosting containers. This is provisioned from within the `container_ipv4_cidr` range. This field will only be set when cluster is in route-based network mode.
+    "nodePoolDefaults": { # Subset of Nodepool message that has defaults. # Default NodePool settings for the entire cluster. These settings are overridden if specified on the specific NodePool object.
+      "nodeConfigDefaults": { # Subset of NodeConfig message that has defaults. # Subset of NodeConfig message that has defaults.
+      },
+    },
     "nodePools": [ # The node pools associated with this cluster. This field should not be set if "node_config" or "initial_node_count" are specified.
       { # NodePool contains the name and configuration for a cluster's node pool. Node pools are a set of nodes (i.e. VM's), with a common configuration and specification, under the control of the cluster master. They may have a set of Kubernetes labels applied to them, which may be used to reference them during pod scheduling. They may also be resized up or down, to accommodate the workload.
         "autoscaling": { # NodePoolAutoscaling contains information required by cluster autoscaler to adjust the size of the node pool to the current cluster usage. # Autoscaler configuration for this NodePool. Autoscaler is enabled only if a valid configuration is present.
@@ -1246,6 +1250,10 @@
     },
   },
   "nodeIpv4CidrSize": 42, # [Output only] The size of the address space on each node for hosting containers. This is provisioned from within the `container_ipv4_cidr` range. This field will only be set when cluster is in route-based network mode.
+  "nodePoolDefaults": { # Subset of Nodepool message that has defaults. # Default NodePool settings for the entire cluster. These settings are overridden if specified on the specific NodePool object.
+    "nodeConfigDefaults": { # Subset of NodeConfig message that has defaults. # Subset of NodeConfig message that has defaults.
+    },
+  },
   "nodePools": [ # The node pools associated with this cluster. This field should not be set if "node_config" or "initial_node_count" are specified.
     { # NodePool contains the name and configuration for a cluster's node pool. Node pools are a set of nodes (i.e. VM's), with a common configuration and specification, under the control of the cluster master. They may have a set of Kubernetes labels applied to them, which may be used to reference them during pod scheduling. They may also be resized up or down, to accommodate the workload.
       "autoscaling": { # NodePoolAutoscaling contains information required by cluster autoscaler to adjust the size of the node pool to the current cluster usage. # Autoscaler configuration for this NodePool. Autoscaler is enabled only if a valid configuration is present.
@@ -1813,6 +1821,10 @@
         },
       },
       "nodeIpv4CidrSize": 42, # [Output only] The size of the address space on each node for hosting containers. This is provisioned from within the `container_ipv4_cidr` range. This field will only be set when cluster is in route-based network mode.
+      "nodePoolDefaults": { # Subset of Nodepool message that has defaults. # Default NodePool settings for the entire cluster. These settings are overridden if specified on the specific NodePool object.
+        "nodeConfigDefaults": { # Subset of NodeConfig message that has defaults. # Subset of NodeConfig message that has defaults.
+        },
+      },
       "nodePools": [ # The node pools associated with this cluster. This field should not be set if "node_config" or "initial_node_count" are specified.
         { # NodePool contains the name and configuration for a cluster's node pool. Node pools are a set of nodes (i.e. VM's), with a common configuration and specification, under the control of the cluster master. They may have a set of Kubernetes labels applied to them, which may be used to reference them during pod scheduling. They may also be resized up or down, to accommodate the workload.
           "autoscaling": { # NodePoolAutoscaling contains information required by cluster autoscaler to adjust the size of the node pool to the current cluster usage. # Autoscaler configuration for this NodePool. Autoscaler is enabled only if a valid configuration is present.