Samples soft delete policy

[shubhangi-google]

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closes: #<issue_number_goes_here>

[gemini-code-assist]

Code Review

This pull request adds new sample scripts and acceptance tests for Google Cloud Storage soft delete features, including setting, getting, and disabling soft delete policies, as well as listing and restoring soft-deleted objects. The review feedback recommends removing leftover binding.pry debugging statements from two of the new sample files and converting the generation command-line argument to an integer in the restore script.

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[thiyaguk09]

please resolve Gemini comments.