Add `optimisation_level` 3 using `GreedyPauliSimp` (#546) #2090

Job	Run time
Run backend tests with QA endpoint	22m 50s
Run calendar visualisation test	52s
Quantinuum - Build and test module (ubuntu-latest)	20m 34s
Run local-emulator tests	1m 12s
Quantinuum - Build and test module (macos-14)	3m 44s
Quantinuum - Build and test module (windows-latest)	6m 10s
Run backend tests with QA and prod endpoint	0s
Publish to pypi	0s
Build docs	0s
	55m 22s

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