feat: use compliant llvm + tket artifacts from hugrverse-env #6412

Job	Run time
Check for changes	4s
tests (Rust beta)	3m 19s
tests (Rust stable, all features)	3m 28s
Check tket-py 🐍	4m 57s
tket-py tests (Python, coverage)	3m 44s
Continuous benchmarking 🏋️	3m 58s
tests (Rust MSRV, min dependencies)	4m 35s
qis-compiler test	3m 2s
tests (Rust stable, no features)	1m 32s
Check Rust code 🦀	2m 4s
Check extension versions	-1s
tests (Rust nightly, coverage)	3m 19s
Check standard extensions	1m 1s
Required checks 🦀+🐍	4s
	35m 6s

Provide feedback