Align as parametrized gate

[andrea-pasquale]

Closes #1325

For simplicity I decided to pass only one qubit instead of multiple qubits.
There were some problems with ParametrizedGate.

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.82%. Comparing base (2ace99a) to head (e109b89).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1332   +/-   ##
=======================================
  Coverage   99.82%   99.82%           
=======================================
  Files          72       72           
  Lines       10559    10560    +1     
=======================================
+ Hits        10540    10541    +1     
  Misses         19       19           

Flag	Coverage Δ
unittests	99.82% <100.00%> (+<0.01%)	⬆️

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