[BUG] Controlled.has_sparse_matrix is incorrect for ops without matrices or sparse matrices

[albi3ro]

Expected behavior

Operator.has_sparse_matrix should agree with whether or not an actual matrix is returned by Operator.sparse_matrix

Actual behavior

Controlled.has_sparse_matrix is always true.

Additional information

No response

Source code

>>> op = qml.ctrl(qml.Permute(np.array([1, 0, 2]), (0, 1, 2)), (3, 4))
>>> op.has_sparse_matrix
True
>>> op.sparse_matrix()
SparseMatrixUndefinedError

Tracebacks

System information

master

Existing GitHub issues

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