[MAINTENANCE] Remove mostly from ExpectColumnUniqueValueCountToBeBetween

[cdkini]

ColumnAggregateExpectations should not have mostly as a param

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[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 79.98%. Comparing base (f0723e1) to head (894d2f8).
Report is 1 commits behind head on develop.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
.../expect_column_unique_value_count_to_be_between.py	83.33%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #10450      +/-   ##
===========================================
+ Coverage    79.97%   79.98%   +0.01%     
===========================================
  Files          461      461              
  Lines        40000    39986      -14     
===========================================
- Hits         31989    31984       -5     
+ Misses        8011     8002       -9     

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3.9 trino	?
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[tyler-hoffman]

Thanks!