test(logger): add unit tests to improve coverage and logging functionality

[VivekShahare04]

Purpose of PR?:Add comprehensive unit tests for the logger package to improve code coverage and ensure logging functionality

Fixes #2130

**Does this PR introduce a breaking change?**No

If the changes in this PR are manually verified, list down the scenarios covered::
1.Logger initialization scenarios:
-Default initialization
-Debug mode enabled
-Debug mode disabled
2.Custom time encoder verification
3.All logging functions:
-Print/Printf
-Debug/Debugf
-Err/Errf
-Warn/Warnf

Additional information for reviewer? :
This PR implements unit tests for the logger package using testify/assert and mock implementations for zap logging.

Checklist:

• Bug fix. Fixes #
• [X ] New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• [X ] PR Title follows the convention of <type>(<scope>): <subject>
• [ X] Commit has unit tests
• [ X] Commit has integration tests