publish git-tag-specific docker images

[adamsachs]

Partially closes #2919

Code Changes

• include a push session arg that can push images corresponding to a git tag, if one exists on the current commit (nox -s "push(git-tag)")
• update GH actions to invoke this push session on any tags that are not prod tags (prod tags already publish a nice, clean, versioned docker image via the push(prod) session, so it's not needed and we don't want to duplicate)
  • this new nox session is a no-op if it finds no explicit git tag on the current commit, so we are OK to invoke it liberally, and it will weed out any commits where there's no tag, e.g. a "normal" commit to main. the dev tagged image will continue to be published on commits to main.
  • as it stands now in the PR, feature and release branch tags will also publish the :dev image. this may or may not be desirable - the main outstanding question i've got for this PR

Steps to Confirm

• i'll use this as a chance to actually push a tag to this branch and see if it goes thru to publish an image on dockerhub!
  • this was successful: this was published by this

Pre-Merge Checklist

• All CI Pipelines Succeeded
• Documentation:
  • documentation complete, PR opened in fidesdocs
  • documentation issue created in fidesdocs
• Issue Requirements are Met
• Relevant Follow-Up Issues Created
• Update CHANGELOG.md
• For API changes, the Postman collection has been updated

Description Of Changes

This should be a helpful piece for both feature-branch deployments and release-branch (rc) deployments

[cypress]

Passing run #1315 ↗︎

0	3	0	0	0
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Details:

Merge 04f974f into d26ed89...
Project: fides	Commit: f91249350f ℹ️
Status: Passed	Duration: 00:37 💡
Started: Apr 12, 2023 7:58 PM	Ended: Apr 12, 2023 7:59 PM

_{This comment has been generated by cypress-bot as a result of this project's GitHub integration settings.}

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (65005e5) 87.41% compared to head (73e458a) 87.41%.

❗ Current head 73e458a differs from pull request most recent head 04f974f. Consider uploading reports for the commit 04f974f to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3050   +/-   ##
=======================================
  Coverage   87.41%   87.41%           
=======================================
  Files         306      306           
  Lines       17534    17540    +6     
  Branches     2255     2255           
=======================================
+ Hits        15327    15333    +6     
  Misses       1793     1793           
  Partials      414      414           

see 4 files with indirect coverage changes

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[NevilleS]

LGTM, my nits are all just naming things.