Add mulitcore support for pytest (#976) #2974

Job	Run time
Flake8 check	1m 8s
Build docs	2m 33s
general-superstaq standalone coverage check with minimum dependency versions	31s
Pytest and Coverage check (3.8)	2m 29s
qiskit-superstaq standalone coverage check with minimum dependency versions	1m 30s
Pytest and Coverage check (3.9)	2m 35s
cirq-superstaq standalone coverage check with minimum dependency versions	1m 11s
Format check	1m 12s
Lint check	1m 49s
Pytest and Coverage check (3.10)	2m 38s
supermarq-benchmarks standalone coverage check with minimum dependency versions	1m 38s
Pytest and Coverage check (3.11)	2m 38s
Pytest and Coverage check (3.12)	3m 32s
Type check	2m 1s
Notebook check for qiskit-superstaq	5m 50s
Pytest macOS	2m 24s
Notebook check for cirq-superstaq	4m 12s
Pytest Windows	5m 35s
Requirements check	1m 46s
	47m 12s

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