Support a BigQuery quota project in BqUtils

[kmontemayor2-sc]

What

• Adds an optional quota_project_id argument to BqUtils.
• Supports GIGL_BIGQUERY_QUOTA_PROJECT as a process-level default, with an explicit argument taking precedence.
• Preserves the existing BigQuery client construction path when no non-empty override is set.
• Propagates a configured quota project into launched Python component environments.
• Documents configuration and the required Service Usage permission.

Why

BigQuery quota and API-enablement checks can need a project distinct from both the active credential project and the project containing BigQuery resources. A BigQuery-scoped client option supports that deployment model without changing quota behavior for other Google Cloud clients.

Testing

• bq_test.py: 11 tests passed.
• Quota environment propagation tests: 2 tests passed.
• Scoped ty checks passed for all changed Python files.
• Ruff and Markdown formatting passed for all changed files.

[mkolodner-sc]

LGTM, thanks!