version definition is no longer used by Docker Compose

[epugh]

Description

Remove the version from the docker-compose.yml files, it actually now generates a warning!

Issues Resolved

n/a

Version

n/a

Frontend features

n/a

Checklist

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[kolchfa-aws]

@epugh There is a related PR #8606 that we're waiting to merge until this change is applied in all pertinent places. See this comment for details #8606 (comment)