Replace deprecated module qiskit.test.mock

[king-p3nguin]

Summary

• Replace deprecated module qiskit.test.mock by qiskit.providers.fake_provider

Details and comments

• When I run the 04_transpiler_passes_and_passmanager.ipynb and 06_building_pulse_schedules.ipynb, I got the following DeprecationWarning

DeprecationWarning: The module 'qiskit.test.mock' is deprecated since Qiskit Terra 0.21.0, and will be removed 3 months or more later. Instead, you should import the desired object directly 'qiskit.providers.fake_provider'.

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[HuangJunye]

Thanks for the contribution! Can you also make similar changes in this file: https://github.com/Qiskit/qiskit-tutorials/blob/master/tutorials/simulators/2_device_noise_simulation.ipynb ?

This should be the last one of these in addition to #1349 that will be merged in the next hour or so.

[HuangJunye]

Thanks for the contribution! Can you also make similar changes in this file: https://github.com/Qiskit/qiskit-tutorials/blob/master/tutorials/simulators/2_device_noise_simulation.ipynb ?

This should be the last one of these in addition to #1349 that will be merged in the next hour or so.

Just realized the device noise simulation notebook is updated in #1348. I will approve and merge this PR as is.