Properly parse ISO date strings

[fjakobs]

Pre Python 3.11 the datetime.fromisoformat isn't a generic date time parser and can only be used to parse ISO dates generated by the python datatime module. This PR normalized the date string the same way the google oauth2 library does by discarding the timezone and millisecond part of the date string.

Changes

Make date parsing for tokens from the CLI more robust

Tests

• Added unit test
• Manually tested with CLI auth provider

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5955333) 57.53% compared to head (ca4964a) 57.53%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #473   +/-   ##
=======================================
  Coverage   57.53%   57.53%           
=======================================
  Files          38       38           
  Lines       25554    25555    +1     
=======================================
+ Hits        14703    14704    +1     
  Misses      10851    10851           

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[mgyucht]

Small nit on the tests but otherwise LGTM.

[mgyucht]

Can you just add an assertion on the actual returned values?
BTW: good practice here would be to use pytest.mark.parameterize annotation, e.g.

@pytest.mark.parametrize(
    "date_string,expected",
    [("2023-12-01T15:19:48.007742617Z", <the expected date>),
      ("2023-12-05T15:59:01.40081+11:00", <the expected date>),
      ("2023-12-06 10:06:05", <the expected date>)])
def test_databricks_cli_token_parse_expiry(date_string, expected):