Always run search CI for global search label MRs

What does this MR do and why?

Related: #396293 (closed)

This MR changes the search version compatibility pipelines so they run for groupglobal search labelled issues (with backend or CI changes detected) in addition to the nightly pipelines.

Screenshots or screen recordings

N/A

How to set up and validate locally

The pipelines are run in this MR which matches one of the rules (CI changes + groupglobal search label)

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.