chore(bazel): update protobuf to v3.21.3 (#7)

* chore(bazel): update protobuf to v3.21.3

chore(bazel): update gax-java to 2.18.4

PiperOrigin-RevId: 463115700

Source-Link: googleapis/googleapis@52130a9

Source-Link: https://github.com/googleapis/googleapis-gen/commit/6a4d9d9bb3afb20b0f5fa4f5d9f6740b1d0eb19a
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiNmE0ZDlkOWJiM2FmYjIwYjBmNWZhNGY1ZDlmNjc0MGIxZDBlYjE5YSJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Anthonios Partheniou <[email protected]>

Author: gcf-owl-bot[bot]

google/cloud/gke_multicloud_v1/services/aws_clusters/async_client.py

@@ -862,9 +862,6 @@ async def sample_delete_aws_cluster():
 
                       }
 
-                   The JSON representation for Empty is empty JSON
-                   object {}.
-
         """
         # Create or coerce a protobuf request object.
         # Quick check: If we got a request object, we should *not* have
@@ -1638,9 +1635,6 @@ async def sample_delete_aws_node_pool():
 
                       }
 
-                   The JSON representation for Empty is empty JSON
-                   object {}.
-
         """
         # Create or coerce a protobuf request object.
         # Quick check: If we got a request object, we should *not* have

google/cloud/gke_multicloud_v1/services/aws_clusters/client.py

@@ -1111,9 +1111,6 @@ def sample_delete_aws_cluster():
 
                       }
 
-                   The JSON representation for Empty is empty JSON
-                   object {}.
-
         """
         # Create or coerce a protobuf request object.
         # Quick check: If we got a request object, we should *not* have
@@ -1863,9 +1860,6 @@ def sample_delete_aws_node_pool():
 
                       }
 
-                   The JSON representation for Empty is empty JSON
-                   object {}.
-
         """
         # Create or coerce a protobuf request object.
         # Quick check: If we got a request object, we should *not* have

google/cloud/gke_multicloud_v1/services/azure_clusters/async_client.py

@@ -743,9 +743,6 @@ async def sample_delete_azure_client():
 
                       }
 
-                   The JSON representation for Empty is empty JSON
-                   object {}.
-
         """
         # Create or coerce a protobuf request object.
         # Quick check: If we got a request object, we should *not* have
@@ -1433,9 +1430,6 @@ async def sample_delete_azure_cluster():
 
                       }
 
-                   The JSON representation for Empty is empty JSON
-                   object {}.
-
         """
         # Create or coerce a protobuf request object.
         # Quick check: If we got a request object, we should *not* have
@@ -2199,9 +2193,6 @@ async def sample_delete_azure_node_pool():
 
                       }
 
-                   The JSON representation for Empty is empty JSON
-                   object {}.
-
         """
         # Create or coerce a protobuf request object.
         # Quick check: If we got a request object, we should *not* have

google/cloud/gke_multicloud_v1/services/azure_clusters/client.py

@@ -1000,9 +1000,6 @@ def sample_delete_azure_client():
 
                       }
 
-                   The JSON representation for Empty is empty JSON
-                   object {}.
-
         """
         # Create or coerce a protobuf request object.
         # Quick check: If we got a request object, we should *not* have
@@ -1672,9 +1669,6 @@ def sample_delete_azure_cluster():
 
                       }
 
-                   The JSON representation for Empty is empty JSON
-                   object {}.
-
         """
         # Create or coerce a protobuf request object.
         # Quick check: If we got a request object, we should *not* have
@@ -2414,9 +2408,6 @@ def sample_delete_azure_node_pool():
 
                       }
 
-                   The JSON representation for Empty is empty JSON
-                   object {}.
-
         """
         # Create or coerce a protobuf request object.
         # Quick check: If we got a request object, we should *not* have