feat(storage): add samples for soft delete (objects)

[thiyaguk09]

Added Storage Samples:

• List Soft Deleted Objects
• List Versions of Soft Deleted Objects
• Restore Deleted Objects
• Disable Soft Delete Policy
• Get Soft Delete Policy
• Set Soft Delete Policy

[snippet-bot]

Here is the summary of changes.

You are about to add 6 region tags.

• storage/src/disable_soft_delete.php:26, tag storage_disable_soft_delete
• storage/src/get_soft_delete_policy.php:26, tag storage_get_soft_delete_policy
• storage/src/list_soft_deleted_object_versions.php:26, tag storage_list_soft_deleted_object_versions
• storage/src/list_soft_deleted_objects.php:26, tag storage_list_soft_deleted_objects
• storage/src/restore_soft_deleted_object.php:26, tag storage_restore_object
• storage/src/set_soft_delete_policy.php:26, tag storage_set_soft_delete_policy

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[TimothyLiuAtGoogle]

What's the difference between the value 864000 and 604800s (with a s suffix as below)? Also, IIUC, the type of 864000 is integer, the type of 604800s is string. Thanks :)

[thiyaguk09]

You're absolutely right — the value 864000 is an integer, while 604800s (with the s suffix) is a string. My bad on that — we’re using integers only here. I've updated it accordingly. Thanks for pointing it out!