feat(TableColumnFilter): revert support case-sensitive

[ArgoZhang]

Link issues

fixes #6629

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Revert case-insensitive support in the string Contains filter by restoring the default string.Contains behavior without the StringComparison overload, and update tests to expect case-sensitive matching.

Bug Fixes:

• Restore case-sensitive behavior for the Contains filter to fix incorrect case-insensitive matches

Enhancements:

• Modify the Contains expression to call the single-parameter string.Contains method instead of the overload with StringComparison

Tests:

• Update unit tests to assert false for case-mismatched scenarios in the Contains filter

[sourcery-ai]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (c7a839d) to head (a506ef3).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #6630   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          739       739           
  Lines        31675     31675           
  Branches      4459      4459           
=========================================
  Hits         31675     31675           

Flag	Coverage Δ
BB	100.00% <100.00%> (?)

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