CCM-11942 workflow fixes for pr waiting

[aidenvaines-cgi]

Description

• Moves all workflow steps which trigger a remote workflow into a single endpoint script. which properly waits for completion/failure of said workflow
• Removes the 'dispatch' workflow which is the second way this was been done
• updated the reusable job to use said script
• Drops the need for callerRunId/JobName as the search now properly identifies the job

Context

We found that multiple branches in this and some other repos which copy workflow ideas had started running in to challenges with build lockstep, race conditions and general instability.

The root cause seems to have been triggering remote workflows in several different ways.

Type of changes

• Refactoring (non-breaking change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would change existing functionality)
• Bug fix (non-breaking change which fixes an issue)

Checklist

• I am familiar with the contributing guidelines
• I have followed the code style of the project
• I have added tests to cover my changes
• I have updated the documentation accordingly
• This PR is a result of pair or mob programming

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• I confirm that neither PII/PID nor sensitive data are included in this PR and the codebase changes.