feat: convert MonitorATMEmptyState to a functional component

[vishvamsinh28]

This PR refactors the MonitorATMEmptyState component from a class-based implementation to a functional component using React functional syntax.

Closes #2789

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.85%. Comparing base (8b3fe77) to head (f2ec809).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2790      +/-   ##
==========================================
- Coverage   96.85%   96.85%   -0.01%     
==========================================
  Files         256      256              
  Lines        7951     7947       -4     
  Branches     2079     2077       -2     
==========================================
- Hits         7701     7697       -4     
- Misses        249      250       +1     
+ Partials        1        0       -1     

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