misc: Add Dialect.split_name method

[alexarice]

Adds a Dialect.split_name method as discussed in #3002

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.83%. Comparing base (6b0a371) to head (aa10a09).
Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3003      +/-   ##
==========================================
- Coverage   89.84%   89.83%   -0.02%     
==========================================
  Files         411      411              
  Lines       51618    51698      +80     
  Branches     8021     8036      +15     
==========================================
+ Hits        46378    46442      +64     
- Misses       3961     3970       +9     
- Partials     1279     1286       +7     

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[superlopuh]

Since we've added an error, it would be good to add a pytest that tracks the error message. The more I think of it, the more it seems that raising ValueError instead of asserting would be a little cleaner. Sorry about the churn. There are a bunch of examples in the tests of how to catch errors and test for contents.