chore(secretmanager): Added code samples for delayed destroy

[durgesh-ninave-crest]

Description

Created samples for Global and Regional Secret Manager API

Samples (Global, Regional)

1. Create Secret With Delayed Destroy
2. Disable Secret Delayed Destroy
3. Update Secret With Delayed Destroy

Checklist

• I have followed guidelines from the CONTRIBUTING.MD
• Appropriate changes to README are included in PR
• Test passed: ../testing/vendor/bin/phpunit test/ -v
• Lint passed: php-cs-fixer fix . --config .php-cs-fixer.dist.php
• These samples need a new API enabled in testing projects to pass (let us know which ones)

Please merge this PR for me once it is approved

[YashSaraf11]

Please assert in the test scenarios that the delayed destory was disabled or updated. I do not see any assert statements on those tests for the operation verification.

[durgesh-ninave-crest]

Please assert in the test scenarios that the delayed destory was disabled or updated. I do not see any assert statements on those tests for the operation verification.

I've updated the assertion to reflect the intended functionality of the sample.

[snippet-bot]

Here is the summary of changes.

You are about to add 6 region tags.

• secretmanager/src/create_regional_secret_with_delayed_destroy.php:28, tag secretmanager_create_regional_secret_with_delayed_destroy
• secretmanager/src/create_secret_with_delayed_destroy.php:28, tag secretmanager_create_secret_with_delayed_destroy
• secretmanager/src/disable_regional_secret_delayed_destroy.php:28, tag secretmanager_disable_regional_secret_delayed_destroy
• secretmanager/src/disable_secret_delayed_destroy.php:28, tag secretmanager_disable_secret_delayed_destroy
• secretmanager/src/update_regional_secret_with_delayed_destroy.php:28, tag secretmanager_update_regional_secret_with_delayed_destroy
• secretmanager/src/update_secret_with_delayed_destroy.php:28, tag secretmanager_update_secret_with_delayed_destroy

---

This comment is generated by snippet-bot.
If you find problems with this result, please file an issue at:
https://github.com/googleapis/repo-automation-bots/issues.
To update this comment, add snippet-bot:force-run label or use the checkbox below:

• Refresh this comment

[durgesh-ninave-crest]

@YashSaraf11 Could you please take a look at this?