ATLAS-5303: ATLAS React UI: Audit Filters dropdown UI breaks when audit table has no data

[Brijesh619]

What changes were proposed in this pull request?

ATLAS-5303: ATLAS React UI: Audit Filters dropdown UI breaks when audit table has no data

• Refactored AdminAuditTable to pass the "Filters" button natively into the TableLayout via the customLeftButton property.
• Removed the floating div wrapper and negative margins that previously caused the UI layout to break when the table was empty.
• Disabled the Filters button during table loading to prevent API race conditions.
• Updated the TableLayout mock in the test suite to properly render customLeftButton.

How was this patch tested?

• Unit Tests: Updated AdminAuditTable.test.tsx to assert the disabled loading state and verify the mock structure. Verified all 50 tests pass successfully (npm run test).
• Manual Tests: Verified the Filters button aligns cleanly within the table toolbar when the audit table is fully populated and when it displays "No Records found!".

[Brijesh619]

[Brijesh619]