Pass hard delete option to snippets bulk destroy

What does this MR do?

When calling Users::DestroyService#execute, the option hard_delete can be passed in so that none of the associated records are migrated to the ghost user.

In this MR, we start passing the options hash to the Snippets::BulkDestroyService#execute so we can skip access checks if hard_delete option is present. This will prevent the service from failing to delete user's snippets because of access errors.

Relates to #214420 (closed)

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• [-] Label as security and @ mention @gitlab-com/gl-security/appsec
• [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• [-] Security reports checked/validated by a reviewer from the AppSec team