Small internal fixes:

• Update links and descriptions in FastApi docs
• Combine all unit tests into one pipeline
  • Adding a new binding type will only involve adding to one new file, not creating a new pipeline
  • Matrix is shared across all tests, so running tests for a new Python version only involves changing one file
• For the release pipeline, always runs the FinishWorkerPr job, regardless of if CreateWorkerPR fails
  • When releasing a new extension for the first time, CreateWorkerPR will fail
  • This has no impact on the current flow
• Fixes log in SB sample function apps