Add 2D GHZ state generation

[shashwatk1998]

This helps leverage our processor's 2D connectivity to generate a GHZ state.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.38%. Comparing base (8dd8a8f) to head (2fee8d9).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #7767    +/-   ##
========================================
  Coverage   99.38%   99.38%            
========================================
  Files        1090     1092     +2     
  Lines       98300    98412   +112     
========================================
+ Hits        97695    97807   +112     
  Misses        605      605            

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