Add `optimisation_level` 3 using `GreedyPauliSimp` #2089

Job	Run time
Run backend tests with QA endpoint	9m 34s
Run calendar visualisation test	56s
Quantinuum - Build and test module (ubuntu-latest)	3m 14s
Run local-emulator tests	1m 11s
Quantinuum - Build and test module (macos-14)	2m 59s
Quantinuum - Build and test module (windows-latest)	6m 38s
Run backend tests with QA and prod endpoint	0s
Publish to pypi	0s
Build docs	0s
	24m 32s

Provide feedback