[WIP] Trying to fix adjoint with Subroutine

[albi3ro]

Context:

Trying to get the adjoint of a subroutine to work:

@qml.templates.Subroutine
def f(x, wires):
    qml.RX(x, wires)

@qml.qjit(capture=True)
@qml.qnode(qml.device('lightning.qubit', wires=1))
def c():
    qml.adjoint(f)(0.5, 0)
    return qml.probs(0)

Description of the Change:

Benefits:

Possible Drawbacks:

Related GitHub Issues:
[sc-111989]

[paul0403]

Closing as the adjoint issues are fixed in #2590