Update RepresentationConverter for new class paths in astropy dev

[braingram]

Astropy recently moved a few classes:

astropy/astropy#14792
moved several classes previously in astropy.coordinates.representation to submodules. This broke the RepresentationConverter. This PR adds the new class paths (and retains the old ones for backwards compatibility).

astropy/astropy#14763
moved several Geodetic classes into astropy.coordinates.representation. The __all__ of this module is used within the asdf-astropy tests to collect classes to test the RepresentationConverter. It does not appear that these Geodetic classes are currently supported by asdf-astropy so the test was updated to ignore these classes from the list of classes to test.

[braingram]

@nden I am unable to request reviewers but this should address the test-dev failure in gwcs (see: spacetelescope/gwcs#454 (comment))

[codecov]

Codecov Report

Merging #181 (f82047e) into main (8bf5fb1) will increase coverage by 0.78%.
The diff coverage is 100.00%.

❗ Current head f82047e differs from pull request most recent head e032601. Consider uploading reports for the commit e032601 to get more accurate results

@@            Coverage Diff             @@
##             main     #181      +/-   ##
==========================================
+ Coverage   98.63%   99.41%   +0.78%     
==========================================
  Files          55       55              
  Lines        2047     2051       +4     
==========================================
+ Hits         2019     2039      +20     
+ Misses         28       12      -16     

Impacted Files	Coverage Δ
...f_astropy/converters/coordinates/representation.py	100.00% <ø> (ø)
asdf_astropy/integration.py	100.00% <ø> (ø)
asdf_astropy/extensions.py	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

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[WilliamJamieson]

This should be on hold until an asdf-coordinates-schemas release supporting this is made.

[braingram]

@WilliamJamieson Can we split this into 2 PRs?

1. addressing the move of already supported classes to astropy.coordinates.representation submodules
2. adding support for Geodetic coordinate representations (as you noted this will have to wait for updates to asdf-coordinates-schemas)

[WilliamJamieson]

@WilliamJamieson Can we split this into 2 PRs?

1. addressing the move of already supported classes to astropy.coordinates.representation submodules
2. adding support for Geodetic coordinate representations (as you noted this will have to wait for updates to asdf-coordinates-schemas)

You are welcome to do whatever you want.

[nden]

This looks good to me. The Geodetic classes are not released yet as far as I can tell. They can be added later. @WilliamJamieson Do you have any other concerns about this PR?