Make PrimitiveJob serializable

[kt474]

Summary

In qiskit-ibm-runtime we want to add job methods to our QiskitRuntimeLocalService (Issue Qiskit/qiskit-ibm-runtime#1607). In order to save PrimitiveJob objects locally we need a way to serialize them. It's currently not serializable due to the use of ThreadPoolExecutor:

qiskit/qiskit/primitives/primitive_job.py

Lines 47 to 48 in 35d0954

	executor = ThreadPoolExecutor(max_workers=1) # pylint: disable=consider-using-with
	self._future = executor.submit(self._function, *self._args, **self._kwargs)

Credit to @t-imamichi

Details and comments

Also fixes #12787

[qiskit-bot]

One or more of the following people are relevant to this code:

• @Qiskit/terra-core
• @ajavadia
• @levbishop
• @t-imamichi

[coveralls]

Pull Request Test Coverage Report for Build 14025762035

Details

• 14 of 20 (70.0%) changed or added relevant lines in 1 file are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.02%) to 88.084%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
qiskit/primitives/primitive_job.py	14	20	70.0%

Files with Coverage Reduction	New Missed Lines	%
crates/accelerate/src/unitary_synthesis.rs	1	94.79%
crates/qasm2/src/lex.rs	3	92.73%

Totals
Change from base Build 13998385695:	0.02%
Covered Lines:	72626
Relevant Lines:	82451

---

💛 - Coveralls

[t-imamichi]

It looks good overall. Could you add a reno to describe that both DataBin and PrimitiveJob become serializable?

[t-imamichi]

LGTM. Could you ask someone else to review it too just in case?

[t-imamichi]

LGTM. Could you review it, @ihincks?