Add regional endpoints code samples

[jakubrauch]

Description

Fixes: N/A

Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google.

Checklist

• [x] I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• [ ] README is updated to include all relevant information
• [x] Tests pass: ~nox -s py-3.9~ pytest (see Test Environment Setup)
  • This class is mostly a copypaste of inspect_string.py, tested using python available on the host
• [ ] Lint pass: nox -s lint (see Test Environment Setup)
• [ ] These samples need a new API enabled in testing projects to pass (let us know which ones)
• [ ] These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• [ ] This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• [ ] This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• [x] Please merge this PR for me once it is approved

[snippet-bot[bot]]

Here is the summary of changes.

You are about to add 1 region tag.

• dlp/snippets/Inspect/inspect_string_rep.py:21, tag dlp_inspect_string_rep

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[glasnt]

Hi @jakubrauch, friendly ping that we're waiting on you to address the code review comments for this PR.

Since this PR is a bit older, we've recently introduced Python 3.13 testing; please rebase your PR to main to ensure your code will be tested against this new version.