Run `*-as-if-foss` jobs on master only

What does this MR do?

Run *-as-if-foss jobs on master only.

These jobs are manual in MRs and for tags.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Separation of EE specific content

Closes #213944 (closed).