Make admin CI page form error pajamas compliant

What does this MR do and why?

Resolves #364933 (closed), #364923 (closed), #364959 (closed)

Makes form errors on the admin CI/CD settings page pajamas compliant

Screenshots or screen recordings

Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

• Navigate to admin/application_settings/ci_cd
• Expand Continuous Integration and Deployment
• Enter an invalid URL (without https) in Auto DevOps domain and hit save
• Form error should appear in Continuous Integration and Deployment and Package Registry

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #364933 (closed)