SNOW-1625379 Test coverage for timedelta under modin/integ/frame part 1

[sfc-gh-azhan]

1. Which Jira issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes SNOW-1625379 Test coverage for timedelta under modin/integ/frame part 1

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
     • If this test skips Local Testing mode, I'm requesting review from @snowflakedb/local-testing
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am adding new credentials
   • I am adding a new dependency
   • If this is a new feature/behavior, I'm adding the Local Testing parity changes.

3. Please describe how your code solves the related issue.

   Please write a short description of how your code change solves the related issue.

This pull request includes several changes to enhance support for the Timedelta type, improve type handling, and add new test cases. The most important changes include adding support for various Timedelta operations, enhancing type checking and handling, and introducing new test cases to ensure the robustness of these features.

Enhancements to Timedelta Support:

• Added support for Timedelta type in various operations like fillna, diff, duplicated, empty, insert, isin, isna, items, iterrows, join, len, melt, nlargest, and nsmallest in the CHANGELOG.md file.
• Removed NotImplementedError for Timedelta in methods such as insert, melt, and merge in snowflake_query_compiler.py. [1] [2] [3]

Improvements in Type Handling:

• Introduced type_match method in SnowparkPandasType class to check type compatibility.
• Enhanced the _simple_unpivot function to handle SnowparkPandasType correctly and added type information for unpivoted columns. [1] [2] [3] [4] [5]
• Updated fillna and diff methods to maintain SnowparkPandasType consistency after operations. [1] [2]

New Test Cases:

• Added test cases for Timedelta type in assign, ffill, bfill, and diff methods to ensure proper functionality. [1] [2] [3] [4]
• Introduced a new test case for Timedelta type in test_compare.py to validate comparison operations. [1] [2]

These changes collectively improve the handling and support of the Timedelta type, ensuring more robust and comprehensive functionality across various operations.

[sfc-gh-azhan]

SnowparkPandasType already extends DataType

[sfc-gh-nkrishna]

Two nits, but approving

[sfc-gh-mvashishtha]

some nits on the tests

[sfc-gh-mvashishtha]

LGTM. thanks!