Refactor 'merge_ rotations' and 'cancel_inverses' peephole optimizations tests #11385

Job	Run time
Determine runner type to use / determine_workflow_runner	1s
Set build matrix / set-constants	5s
Runtime Code Coverage (Linux)	1m 23s
Catalyst-Runtime Build (gcc)	50s
LLVM Build (gcc)	31s
Enzyme Build (gcc)	17s
MHLO Dialect Build (gcc)	6s
Runtime Tests (Linux) (lightning, gcc)	22s
Runtime Tests (Linux) (lightning-kokkos, gcc)	17s
Runtime Tests (Linux) (openqasm, gcc)	18s
Runtime Tests (Linux) (oqc, gcc)	45s
Runtime Tests (Linux) (oqd, gcc)	36s
Quantum Dialects Build (gcc)	3m 30s
Frontend Tests (gcc)	8m 28s
Frontend Tests (backend="openqasm3") (gcc)	1m 41s
Frontend Tests (backend="lightning.kokkos") (gcc)	6m 59s
	26m 9s

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