Manage edge case of pickling instmap. #9487
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Summary
This is a followup PR of #8885 for (edge case) bug fix. When
InstructionScheduleMap.addis called withargumentsand non-picklable value is specified (such as python dict key), parallel transpile will fail with the inst map due to this line.https://github.com/Qiskit/qiskit-terra/blob/a3b359b899d5d963272a7b424c8a283bc6bd4c0d/qiskit/compiler/transpiler.py#L365-L368
Details and comments
See new test case for code to reproduce the bug. This PR typecast
argumentsto python list so that any iterable is stored in the picklable format.