Make TopKDynamicFilters public

[masonh22]

Which issue does this PR close?

• Closes #.

Rationale for this change

TopKDynamicFilters is needed as an argument to TopK::try_new(), so without it it's impossible to construct a TopK.

What changes are included in this PR?

What is the testing strategy for this PR?

Are there any user-facing changes?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.33%. Comparing base (3ab72e6) to head (a265ecd).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #25429      +/-   ##
==========================================
- Coverage   82.34%   82.33%   -0.01%     
==========================================
  Files        1137     1137              
  Lines      432364   432364              
  Branches   432364   432364              
==========================================
- Hits       356020   356002      -18     
- Misses      54830    54847      +17     
- Partials    21514    21515       +1     

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