fix: test case ut_lind_fs_mkdir_using_symlink

[ChinmayShringi]

Description

Fixes # (issue)

This pull request introduces a test case (ut_lind_fs_mkdir_using_symlink) that ensures the correct handling of file creation, linking, and unblinking. Added unlink syscalls to remove file prior to test case and after test case is completed.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• cargo test ut_lind_fs_mkdir_using_symlink

Checklist:

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been added to a pull request and/or merged in other modules (native-client, lind-glibc, lind-project)