Adjust grid_device for optimization

[dstrain115]

• Slightly optimize validation to avoid calling op.qubits several
  times. This also avoids an isinstance check.
• Change instance GateFamily for cirq.I into a type GateFamily for
  IdentityGate which is faster and more general.
• Also add ignore_global_phase=False versions of gatesets.
• These gatesets are faster since they do not perform unitary
  decomposition to check equivalency.
• Internal versions will switch to these versions once this change
  propagates.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.38%. Comparing base (3317377) to head (a3113f3).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main    #7693    +/-   ##
========================================
  Coverage   99.38%   99.38%            
========================================
  Files        1089     1089            
  Lines       97414    97531   +117     
========================================
+ Hits        96812    96930   +118     
+ Misses        602      601     -1     

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