Add CI pattern to rspec rules for merge requests

What does this MR do?

Fixes #337416 (closed)

Add CI pattern to rspec job rules

Prior to 75c13f96,
MR pipelines that change CI would run all rspec jobs, as
the change patterns `backend-patterns`, `db-patterns`,
`code-backstage-patterns` include ci patterns.

However 75c13f96 added a `when: never` rule above the patterns.
This resulted in CI specific change not having rspec jobs.