[BUG] Fix type error bug

[RNKuhns]

Reference Issues/PRs

Fixes #129.

What does this implement/fix? Explain your changes.

Error referenced in #129 was being raised through skbase.utils.check_sequence. This cleans up the error messaging there and in other type checking utility functions. They now raise TypeErrors and use a utility function to remove boilerplate "" when converting classes to strings.

Does your contribution introduce a new dependency? If yes, which one?

None.

What should a reviewer concentrate their feedback on?

Change in error messages.

Any other comments?

PR checklist

For all contributions

• I've reviewed the project documentation on contributing
• I've added myself to the list of contributors.
• The PR title starts with either [ENH], [CI/CD], [MNT], [DOC], or [BUG] indicating whether
  the PR topic is related to enhancement, CI/CD, maintenance, documentation, or a bug.

For code contributions

• Unit tests have been added covering code functionality
• Appropriate docstrings have been added (see documentation standards)
• New public functionality has been added to the API Reference

[codecov-commenter]

Codecov Report

Merging #130 (35dcab8) into main (633b870) will increase coverage by 0.10%.
The diff coverage is 100.00%.

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@@            Coverage Diff             @@
##             main     #130      +/-   ##
==========================================
+ Coverage   81.93%   82.03%   +0.10%     
==========================================
  Files          30       30              
  Lines        2236     2249      +13     
==========================================
+ Hits         1832     1845      +13     
  Misses        404      404              

Impacted Files	Coverage Δ
skbase/utils/tests/test_iter.py	100.00% <ø> (ø)
skbase/utils/_iter.py	100.00% <100.00%> (ø)
skbase/validate/_types.py	100.00% <100.00%> (ø)
skbase/validate/tests/test_type_validations.py	100.00% <100.00%> (ø)

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[RNKuhns]

@fkiraly this should be ready for review.

[fkiraly]

Looks good to me.
I have a gut feeling that there might probably already be a method that does _remove_type_text, but I don't know, so fine with me.

My main design comment would be, test_type_validations, especially test_check_sequence_output looks like there is a lot of repetition that could be covered by pytest.mark.parametrize, but not a blocker for me.