[FEATURE] Add support for parsing not gate

[TheGupta2012]

Feature Description

The qasm -

OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
not q[1];

should be correctly parsed but raised an error -

ValidationError: Unsupported / undeclared QASM operation: not

We should add the alias for it in maps.py and apply the x gate whenever it is encountered

Implementation (Optional)

No response

[arulandu]

Is this still open? it seems like not is already in ONE_QUBIT_OP_MAP in maps.py

[TheGupta2012]

Yep, was added in an earlier PR, forgot to add a back-ref. Thanks for highlighting!