Clean up GCP plugin logging strings and adjust mypy settings for current plugin constraints

[drwicid]

Description

Summary

The GCP plugin branch includes a small cleanup commit that is not part of a behavior fix. It standardizes embedded quote usage in log messages and relaxes a few mypy error codes in the plugin tox configuration to reflect current typing limits.

This issue, and warnings were flagged while attempting to run tox testing of PR #2334

Impact

• Removes inconsistent quoting in log output paths.
• Keeps the plugin import and static-analysis path cleaner.
• Reduces friction from mypy failures that are not currently actionable in the plugin.

Affected Files And Changes

• plugins/gcp/fix_plugin_gcp/resources/base.py
  • Normalize the embedded 'global' fallback quoting in the collection log message.
• plugins/gcp/fix_plugin_gcp/resources/filestore.py
  • Normalize the embedded 'global' fallback quoting in the snapshot collection log message.
• plugins/gcp/fix_plugin_gcp/resources/firestore.py
  • Normalize the embedded 'global' fallback quoting in the document collection log message.
• plugins/gcp/tox.ini
  • Expand the mypy command with targeted flags for existing plugin typing gaps.

Expected Outcome

• Log message formatting stays consistent across GCP resource modules.
• The plugin's mypy job reflects the current codebase constraints instead of failing on known non-actionable cases.

Version

v3.4.0

Environment

Docker

Steps to Reproduce

No response

Logs

Additional Context

No response