Add `optimisation_level` 3 using `GreedyPauliSimp` #2087

Job	Run time
Run calendar visualisation test	58s
Run local-emulator tests	1m 17s
Run backend tests with QA endpoint	13m 32s
Quantinuum - Build and test module (ubuntu-latest)	2m 52s
Quantinuum - Build and test module (macos-14)	2m 39s
Run backend tests with QA and prod endpoint	0s
Quantinuum - Build and test module (windows-latest)	4m 21s
Publish to pypi	0s
Build docs	0s
	25m 39s

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