Timeout on `GPGraph` construction in `GreedyPauliSimp` #6319

Job	Run time
Check tket library version	14s
Check C++ code formatting	25s
Build and test pytket (ubuntu)	11m 12s
Build and test pytket (windows)	13m 39s
Build and test (tket) (ubuntu-24.04)	3m 14s
Build and test pytket (macos) (macos-13)	7m 34s
Build and test (tket) (macos-13)	3m 57s
Build and test (tket) (windows-2022)	5m 48s
Build and test pytket (macos) (macos-15)	5m 40s
Build and test (tket) (macos-15)	2m 16s
Check documentation build	52s
Check pytket line and branch coverage	5s
Publish pytket coverage	0s
All build and test jobs successful (or skipped)	1s
	54m 57s

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