Add `optimisation_level` 3 using `GreedyPauliSimp` #2085

Job	Run time
Run local-emulator tests	1m 13s
Run calendar visualisation test	41s
Run backend tests with QA endpoint	19m 3s
Run backend tests with QA and prod endpoint	0s
Quantinuum - Build and test module (ubuntu-latest)	3m 18s
Quantinuum - Build and test module (macos-14)	2m 54s
Quantinuum - Build and test module (windows-latest)	6m 2s
Publish to pypi	0s
Build docs	0s
	33m 11s

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