If user can push to docker then it can delete too

What does this MR do?

Implements a simple solution to #40096 (closed). Docker permissions for the ci user have been extended, if the user has permission to push, then it has permission to delete as well.

Risks

This will allow the job to delete tags/images unrelated to the build, allowing the user to potentially remove unwanted tags/images.

Closes #40096 (closed)

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry for user-facing changes, or community contribution. Check the link for other scenarios.
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Performance 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

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

Closes #40096 (closed)