Fixing various typing issues

[max-radin]

Description

This pull request addresses two minor typing issues:

• MatrixFactoryGate.controlled did not use the same parameter name as the controlled method of the Gate protocol.
• One of the decomposition rules tried to access the num_control_qubits attributes of a gate without ensuring that the gate is of type ControlledGate.

Please verify that you have completed the following steps

• I have self-reviewed my code.
• I have included test cases validating introduced feature/fix.
• I have updated documentation.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4af3cdc) 95.08% compared to head (abefda2) 95.08%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #87   +/-   ##
=======================================
  Coverage   95.08%   95.08%           
=======================================
  Files          49       49           
  Lines        3135     3135           
=======================================
  Hits         2981     2981           
  Misses        154      154           

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