Add DELETE endpoint for a specific record in ClothingBrand table

[Arik]

Add DELETE endpoint for a specific record in ClothingBrand table.

Acceptance Criteria:

• In ClothingBrandController.java there is code for an
  endpoint DELETE /api/ClothingBrand?id=123 endpoint
  that deletes the record if it exists, and returns 200 (ok) and
  the text record 123 deleted, or returns 404 (Not Found) and
  the text record 123 not found if it does not.
• The Swagger-UI endpoints for this endpoint is well documented
  so that any member of the team can understand how to use it.
• The endpoint works as expected on localhost.
• The endpoint works as expected when deployed to Dokku.
• There is full test coverage (Jacoco) for the new code in
  ClothingBrandController.java
• There is full mutation test coverage (Pitest) for new code in
  ClothingBrandController.java