feat: Updates Place Class and Place Text Search examples for GA release.

[willum070]

Updates Place Class and Place Text Search examples for GA release.

• Moved place-class and place-text-search to weekly channel.
• Updated place-class to remove obsolete functions.
• Spiffed up place-class with an advanced marker, because put a marker on it!

Fixes #1661 🦕

[snippet-bot]

Here is the summary of changes.

You are about to delete 2 region tags.

• samples/place-class/index.ts:8, tag maps_place_class_findplacebyquery
• samples/place-class/index.ts:71, tag maps_place_class_findplacebyphonenumber

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[googlemaps-bot]

🎉 This PR is included in version 3.20.0 🎉

The release is available on GitHub release

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