Add __eq__() method to (Parametric)QuantumGate

[toru4838]

Comparing two Pauli or PauliRotation gates that have equivalent matrix representation but different order of target_indice and pauli_ids gives the result we don't expect.

For example,

Pauli(target_indices=(0,1), pauli_ids=(1,2)) == Pauli(target_indices=(0,1), pauli_ids=(1,2))  # True
Pauli(target_indices=(0,1), pauli_ids=(1,2)) == Pauli(target_indices=(1,0), pauli_ids=(2,1))  # False

This PR adds __eq__() method to QuantumGate and ParametricQuantumGate that compares the pairs of target_index and pauli_id

[github-actions]

🚀 Deployed on https://deploy-preview-277--quri-parts.netlify.app

[dchung0741]

LGTM!