Xpath used to read the header text is flaky.
Solution:
Replacing xpath with css locator to make it stable
EE PR: https://github.com/appsmithorg/appsmith-ee/pull/4382
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## Summary by CodeRabbit
- **Tests**
- Updated spec names and file paths for tests related to Community
Issues and TableV2 widget.
- **Refactor**
- Simplified the selector for table headers to improve readability and
maintainability.
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