Add markers to base images

[romoh]

Merge Checklist

All boxes should be checked before merging the PR (just tick any boxes which don't apply to this PR)

• [X] Ready to merge

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Summary

What does the PR accomplish, why was it needed? Add markers in the base images so it is easier to differentiate and know the source when images are up and running.

Does this affect the toolchain?

YES/NO

Test Methodology

• Pipeline build in progress