Rc/update gitlab styles with changes

What does this MR do?

This updates gitlab-styles to 3.1.0. It disables all new cops that fail because of this update as well as the existing cop RSpec/DescribedClass as this was causing spec failures. These cops will be re-enabled in subsequent MRs and will be tracked here: #42182 (closed)

Previous discussion here !21604 (closed)

Screenshots

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

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