Upgrade Google Ads to 47.0.0 (API v25)

[github-actions]

This PR was created by update-googleads-version.yml. It upgrades com.google.api-ads:google-ads from API v23 to API v25.

Please review the changes and merge if all tests pass. If failures happen, please try to update this PR (and the workflow automation, if broken) to resolve them, or reach out to dev@beam.apache.org for assistance.

Google Ads API versions are deprecated and sunset on a rolling ~12-month schedule, after which requests to sunset versions fail at runtime and break GoogleAdsIO. This workflow upgrades the version as new releases come out (roughly every three months) to prevent deprecation breakage.

Previous issues where this caused customer impact: #37618 and #32241.

[github-actions]

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