Add QA test for raw variables in CI config YAML

What does this MR do and why?

I moved the QA test from !102536 (merged) to here.

Step	Status
Add expand syntax to CI config	!98420 (merged)
Implement expand/raw logic for basic jobs	!102536 (merged)
Add QA test for raw variables in CI config YAML	<- HERE
Use expand/raw logic for variables passed by bridge/trigger	!103190 (merged)
Add documentation and CI schema for expand/raw	!103313 (merged)

Related to #353991 (closed)

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