Pandas 2

[isaac-tfn]

Describe Changes

Update dependency to use pandas 2.0. There also need to be some changes to pydantic implementations to avoid deprecation warnings and get it ready for 3.0.

Task Checklist

• [x] Have unittests been added (testing individual functions and their edge cases)
• [x] Have integration tests been added (if applicable, to test modules of functionality)
• [ ] Updated RELEASE.md to reflect changes in PR
• [ ] Have new dependencies been added?
  • [x] Have they been added to either requirements.txt or requirements_dev.txt.
  • [ ] Have they been added to setup.cfg

[isaac-tfn]

@MattBuckley-TfN Mainly getting pydantic 2 and pandas 2 in, as well as a couple of bug fixes, no rush really AECOM can work from the branch