Add fake generic and modify tests (#10266)

* Added a FakeGeneric BackendV2 backend, this is just a bare minimum working code

* All FakeBackends (like FakeMelbourne, FakeBoeblingen ,etc) is replaced with FakeGeneric

* relocated FakeGeneric in fake_provider directory; replaced if-elif with instruction_dict in fake_generic.py; added support of grid type of coupling map; using lower number of qubits, passed all tests of test_transpiler except one method ( test_parallel_dispatch_lazy_cal_loading )

* added tests for FakeGeneric

* This commit just reformats test_transpiler.py fake_generic.py and test_fake_generic.py

* Update qiskit/providers/fake_provider/fake_generic.py

Co-authored-by: atharva-satpute <55058959+atharva-satpute@users.noreply.github.com>

* Update qiskit/providers/fake_provider/fake_generic.py

Co-authored-by: atharva-satpute <55058959+atharva-satpute@users.noreply.github.com>

* Update test/python/providers/fake_provider/test_fake_generic.py

Co-authored-by: atharva-satpute <55058959+atharva-satpute@users.noreply.github.com>

* Update test/python/providers/fake_provider/test_fake_generic.py

Co-authored-by: atharva-satpute <55058959+atharva-satpute@users.noreply.github.com>

* Fix some tests

* Add calibration schedules, fix transpiler tests

* Fix lint

* Refactor, add pulse functionality

* Latest updates to FakeGeneric

* Fix some unit tests

* Fix some unit tests

* Fix tests, lint, refactor

* Remove unused inputs

* Make calibrations optional

* Attempt to speed up test: only add calibrations if option enabled

* Revert some tests to V1

* Refactor FakeGeneric

* Update unit test

* Rename supported instructions to operations, fix tests

Fix test seed

Fix unit test, lint

* Restore vf2postlayout test to V1

Fx vf2 test

* Add pulse test to validate pulse capabilities of new fake backend

Update fake generic

* Update docs, fix lint

* Avoid set for basis gates to allow reproducibility in the error/duration value generation

* Update calibrations

* Fix transpiler test

* Add run test to confirm noise defaults

* Add CZ to basis gates, dtm, update backend names, fix docs

* Remove GenericTarget, add default for basis_gates, remove supported_operations.

* Apply review comments, modify calibrate_instructions to avoid public calibration method.

* New name proposal

* Fix lint and test

* Fix comment

* Apply Kevin's suggestions to extract defaults from class

* Make defaults private

* Fix lint

* Revert previous 3 comments.

* Privatize GenericFakeBackend

* Remove from docs

* Revert privatization

* Apply review comments

* Add reno

* Fix lint

* Apply suggestions from Matt's code review

Co-authored-by: Matthew Treinish <mtreinish@kortar.org>

* Apply comments from code review

* Fix lint

* Rename to GenericBackendV2 and adjust docs.

* Fix lint

* Apply comments from code review

* It's not 2023 anymore

* Fix conflict

* Fix test conflict.

---------

Co-authored-by: atharva-satpute <55058959+atharva-satpute@users.noreply.github.com>
Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com>
Co-authored-by: Elena Peña Tapia <epenatap@gmail.com>
Co-authored-by: Matthew Treinish <mtreinish@kortar.org>
Co-authored-by: Kevin Hartman <kevin@hart.mn>

qiskit/providers/fake_provider/__init__.py

@@ -1,6 +1,6 @@
 # This code is part of Qiskit.
 #
-# (C) Copyright IBM 2022.
+# (C) Copyright IBM 2022, 2024.
 #
 # This code is licensed under the Apache License, Version 2.0. You may
 # obtain a copy of this license in the LICENSE.txt file in the root directory
@@ -20,10 +20,11 @@
 Overview
 ========
 
-The fake provider module contains fake providers and fake backends classes. The fake backends are
-built to mimic the behaviors of IBM Quantum systems using system snapshots. The system snapshots
-contain important information about the quantum system such as coupling map, basis gates, qubit
-properties (T1, T2, error rate, etc.) which are useful for testing the transpiler and performing
+The fake provider module contains fake providers, fake backends and other simulated backend
+implementations. The fake backends are built to mimic the behaviors of IBM Quantum systems
+using system snapshots. The system snapshots contain important information about the quantum
+system such as coupling map, basis gates, qubit properties (T1, T2, error rate, etc.) which
+are useful for testing the transpiler and performing
 noisy simulation of the system.
 
 Example Usage
@@ -210,6 +211,7 @@
     FakeBackendV2
     FakeBackend5QV2
     FakeMumbaiFractionalCX
+    GenericBackendV2
 
 Fake Backend Base Classes
 =========================
@@ -241,10 +243,11 @@
 # Standard fake backends with IBM Quantum systems snapshots
 from .backends import *
 
-# Special fake backends for special testing perpurposes
+# Special fake backends for special testing purposes
 from .fake_qasm_simulator import FakeQasmSimulator
 from .fake_openpulse_2q import FakeOpenPulse2Q
 from .fake_openpulse_3q import FakeOpenPulse3Q
 from .fake_1q import Fake1Q
 from .fake_backend_v2 import FakeBackendV2, FakeBackend5QV2
 from .fake_mumbai_v2 import FakeMumbaiFractionalCX
+from .generic_backend_v2 import GenericBackendV2