Revert "CI: Build and tag container on PRs"

[qcasey]

Reverts #79

This is failing in many different ways I didn't expect and needs to be revisited.

1. Write permissions are not given to outside forks (for security) failed here
   
2. Whatever is going on here...

Anyway, it's creating unnecessarily failed checks and is annoying. I'll retest and get some input from the CI team this week.

[coveralls]

Pull Request Test Coverage Report for Build 1869923691

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.084%

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Totals
Change from base Build 1869905235:	0.0%
Covered Lines:	3920
Relevant Lines:	4257

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💛 - Coveralls

[github-actions]

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