chore: enable generation for google-cloud-dataplex (#16723)

Author: jskeet

librarian.yaml

@@ -1677,7 +1677,6 @@ libraries:
     keep:
       - CHANGELOG.md
       - docs/CHANGELOG.md
-    skip_generate: true
     python:
       product_documentation_override: https://cloud.google.com/dataplex
       metadata_name_override: dataplex

packages/google-cloud-dataplex/.repo-metadata.json

@@ -1,16 +1,16 @@
 {
-  "api_description": "provides intelligent data fabric that enables organizations to centrally manage, monitor, and govern their data across data lakes, data warehouses, and data marts with consistent controls, providing access to trusted data and powering analytics at scale.",
-  "api_id": "dataplex.googleapis.com",
-  "api_shortname": "dataplex",
-  "client_documentation": "https://cloud.google.com/python/docs/reference/dataplex/latest",
-  "default_version": "v1",
-  "distribution_name": "google-cloud-dataplex",
-  "issue_tracker": "",
-  "language": "python",
-  "library_type": "GAPIC_AUTO",
-  "name": "dataplex",
-  "name_pretty": "Cloud Dataplex",
-  "product_documentation": "https://cloud.google.com/dataplex",
-  "release_level": "stable",
-  "repo": "googleapis/google-cloud-python"
+    "api_description": "provides intelligent data fabric that enables organizations to centrally manage, monitor, and govern their data across data lakes, data warehouses, and data marts with consistent controls, providing access to trusted data and powering analytics at scale.",
+    "api_id": "dataplex.googleapis.com",
+    "api_shortname": "dataplex",
+    "client_documentation": "https://cloud.google.com/python/docs/reference/dataplex/latest",
+    "default_version": "v1",
+    "distribution_name": "google-cloud-dataplex",
+    "issue_tracker": "https://issuetracker.google.com/issues/new?component=1155079\u0026template=1656695",
+    "language": "python",
+    "library_type": "GAPIC_AUTO",
+    "name": "dataplex",
+    "name_pretty": "Cloud Dataplex",
+    "product_documentation": "https://cloud.google.com/dataplex",
+    "release_level": "stable",
+    "repo": "googleapis/google-cloud-python"
 }

packages/google-cloud-dataplex/noxfile.py

@@ -390,7 +390,6 @@ def docs(session):
     shutil.rmtree(os.path.join("docs", "_build"), ignore_errors=True)
     session.run(
         "sphinx-build",
-        "-W",  # warnings as errors
         "-T",  # show full traceback on exception
         "-N",  # no colors
         "-b",