Fixes pandas date method + fix ingest tests race conditions

[AsafMah]

Added

Changed

Fixed

[github-actions]

Test Results

    5 files  ±0      5 suites  ±0   10m 53s ⏱️ + 5m 58s
  318 tests +1    283 ✅ +1   35 💤 ±0  0 ❌ ±0 
1 590 runs  +5  1 415 ✅ +5  175 💤 ±0  0 ❌ ±0 

Results for commit b764def. ± Comparison against base commit 9e97682.

♻️ This comment has been updated with latest results.

[Copilot]

Pull request overview

This pull request fixes datetime column handling in older pandas versions by correcting the regex pattern used to detect dots in datetime strings and updating related test infrastructure.

Key changes:

• Fixed regex pattern in parse_datetime to properly escape the dot character for pandas versions before 2.0
• Changed logical operator from not to ~ for pandas boolean Series negation
• Refactored E2E tests to create isolated tables per test instead of sharing a single table

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
azure-kusto-data/azure/kusto/data/helpers.py	Fixed regex pattern from "." to "\\." and updated logical operator from not to ~ for proper pandas boolean handling; added force_version parameter for testing; updated type hints to use modern syntax
azure-kusto-data/tests/test_helpers.py	Added new test test_datetime_parsing to verify datetime parsing with both pandas v1 and v2 behaviors using the force_version parameter
azure-kusto-ingest/tests/test_e2e_ingest.py	Refactored test infrastructure to create unique tables per test with init_table() and drop_table() methods, removing shared table state and improving test isolation
CHANGELOG.md	Documented the datetime handling fix for old pandas versions

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[github-actions]

Please commit the suggested changes from markdownlint.

[github-actions]

Please commit the suggested changes from markdownlint.