add switch_case to json decoder.py

[kevinsung]

Summary

Adds switch_case to the JSON decoder. Not sure if/how this should be tested. Please advise.

Details and comments

[coveralls]

Pull Request Test Coverage Report for Build 5614902096

• 8 of 8 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 52.012%

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Totals
Change from base Build 5603235847:	0.0%
Covered Lines:	3154
Relevant Lines:	6064

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💛 - Coveralls

[merav-aharoni]

The file test/unit/transpiler/passes/scheduling/test_scheduler.py contains tests for various dynamic circuit constructs, such as for_loop, if_else, etc. So you can follow the examples there for switch.

[kevinsung]

The file test/unit/transpiler/passes/scheduling/test_scheduler.py contains tests for various dynamic circuit constructs, such as for_loop, if_else, etc. So you can follow the examples there for switch.

Those tests don't seem to be testing the decoding. For example, if I comment out the lines below, those tests still pass.

qiskit-ibm-provider/qiskit_ibm_provider/utils/json_decoder.py

Lines 111 to 113 in e2e4463

	"if_else": IfElseOp,
	"while_loop": WhileLoopOp,
	"for_loop": ForLoopOp,

[kt474]

I think your linter/editor reorganized the order of the dependencies, but the change itself LGTM

@nkanazawa1989 this adds on to your PR from #413

[kevinsung]

I think your linter/editor reorganized the order of the dependencies, but the change itself LGTM

I did add an import statement and then used ruff to reorganize the imports. That's an improvement though, right? Do you want me to revert it?