feat: add annotations samples for regional SM

[vipul7499]

Description

Fixes #

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Checklist

• [ ] I have followed guidelines from CONTRIBUTING.MD and Samples Style Guide
• [ ] Tests pass: npm test (see Testing)
• [ ] Lint pass: npm run lint (see Style)
• [ ] 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 pull request is from a branch created directly off of GoogleCloudPlatform/nodejs-docs-samples. Not a fork.
• [ ] This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• [ ] This sample adds a new sample directory, and I created GitHub Actions workflow 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
• [ ] Please merge this PR for me once it is approved

[snippet-bot[bot]]

Here is the summary of changes.

You are about to add 3 region tags.

- [secret-manager/regional_samples/createRegionalSecretWithAnnotations.js:24](https://github.com/GoogleCloudPlatform/nodejs-docs-samples/blob/0604525854f9b1d290d75208cf635d9d87851e7f/secret-manager/regional_samples/createRegionalSecretWithAnnotations.js#L24), tag `secretmanager_create_regional_secret_with_annotations` - [secret-manager/regional_samples/editRegionalSecretAnnotations.js:24](https://github.com/GoogleCloudPlatform/nodejs-docs-samples/blob/0604525854f9b1d290d75208cf635d9d87851e7f/secret-manager/regional_samples/editRegionalSecretAnnotations.js#L24), tag `secretmanager_edit_regional_secret_annotations` - [secret-manager/regional_samples/viewRegionalSecretAnnotations.js:18](https://github.com/GoogleCloudPlatform/nodejs-docs-samples/blob/0604525854f9b1d290d75208cf635d9d87851e7f/secret-manager/regional_samples/viewRegionalSecretAnnotations.js#L18), tag `secretmanager_view_regional_secret_annotations`

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