Uplift eaton ups exporter code base

[TobiasKadelka]

The main feature of this PR is to add pyre type checking and pytests to the CI workflow! It removes or simplifies imports and a lot of other code, as well as version specifications -- The aim is to simplify work and changes on the exporter in the future. :)

Changes:

• add type hints to code; add pyre to CI
  • some changes in existing code where necessary to by pyre compliant
• remove or simplify imports
  • replace urllib3 import with urllib3 from the requests.packages (close #28)
  • use pytest-vcr instead of vcrpy for tests
• update existing tests
  • add pytest to CI workflow
  • update tests and cassettes to allow the tests to succeed
  • two of the old ones still do not work, the functionality needs to be tested differently
• remove version specifications when they are unneeded from pyproject.toml
  • the current tests require some specific versions, these are not removed
• add some files to .gitignore
• removes a lot of old/uneeded code

[TobiasKadelka]

Is that missing from this PR? Or was that done manually?

It was done manually.

The other feedback is implemented; Thanks a lot for your thoughts!

[aqw]

It was done manually.

This is OK for now, but for the sake of future sanity and ensuring that star credentials don't leak (it only takes one), this should be automated.

I will merge this PR as-is. Please put automated credential removal on your list somewhere. :-)