Raise error eagerly on bad unitary synthesis method

[rupeshknn]

Summary

generate_preset_pass_manager now raises an error the pass manager is created, not when it is run.

Fixes #11355

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[coveralls]

Pull Request Test Coverage Report for Build 7095555132

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• 4 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.03%) to 87.455%

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Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/lex.rs	4	91.67%

Totals
Change from base Build 7078267006:	0.03%
Covered Lines:	59930
Relevant Lines:	68527

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💛 - Coveralls

[kevinsung]

Thanks! Please add a test.

[rupeshknn]

Do you have a recommendation for where the test should be located? I couldn't find test files (within synthesis) that check whether a particular error was raised.

Or I could add one where the pass manager is tested. https://github.com/Qiskit/qiskit/blob/main/test/python/transpiler/test_preset_passmanagers.py

[rupeshknn]

I've added the test to test/python/transpiler/test_stage_plugin.py:

[kevinsung]

Thank you!

[jakelishman]

Thank you!