[CI] Build docker image on release

[surchs]

Changes proposed in this pull request:

• Related to Build Docker on release, not (just) push #183

So far, we only made releases with auto. However because the release is done by a bot, this will not trigger our "release-published" hook that we rely on to build and push our docker images. So this PR

• builds and pushes the docker image directly inside of the release workflow (could also be a separate workflow that is just called from there)
• gets the release version and tags the docker image with it
• removes the old (on release) docker build workflow

Checklist

• PR has an interpretable title with a prefix ([ENH], [FIX], [REF], [TST], [CI], [MNT], [INF], [MODEL], [DOC]) (see https://neurobagel.org/contributing/pull_requests for more info)
• PR links to GitHub issue with mention Closes #XXXX
• Tests pass
• Checks pass

For new features:

• Tests have been added

For bug fixes:

• There is at least one test that would fail under the original bug conditions.

[github-actions]

Pull Request Test Coverage Report for Build 7197611936

• 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 99.696%

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Totals
Change from base Build 7186566544:	0.0%
Covered Lines:	1311
Relevant Lines:	1315

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💛 - Coveralls

[surchs]

Closing in favour of the steps outlined here: neurobagel/planning#64