Update core libs

[dmannarino]

Pull request checklist

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• Make sure you are requesting to pull a topic/feature/bugfix branch (right side). Don't request your master!
• Make sure you are making a pull request against the develop branch (left side). Also you should start your branch off our develop.
• Check the commit's or even all commits' message styles matches our requested structure.
• Check your code additions will fail neither code linting checks nor unit test.

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

Update fastapi, etc. to recent versions

What is the current behavior?

Core libraries are ancient

Issue Number: GTC-2705

What is the new behavior?

• Core libraries are most recent versions
• I broke apart some tests and refactored some fixtures
• I introduced a lifespan function in place of separate startup/shutdown functions, because that's how fastapi wants us to do things now.

Does this introduce a breaking change?

• Yes
• No

Other information

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.92%. Comparing base (66ccef6) to head (c7e8dc4).

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Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #480      +/-   ##
===========================================
- Coverage    81.95%   81.92%   -0.03%     
===========================================
  Files          126      126              
  Lines         5685     5688       +3     
===========================================
+ Hits          4659     4660       +1     
- Misses        1026     1028       +2     

Flag	Coverage Δ
unittests	81.92% <100.00%> (-0.03%)	⬇️

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