Update to Rust 1.78 #7110

Job	Run time
Format Q# Files	52s
Clippy	1m 2s
Format	13s
Build and test (windows-latest)	31m 21s
Integration tests (windows-latest)	9m 13s
Build and test (ubuntu-latest)	18m 18s
run benchmark	12m 55s
Integration tests (ubuntu-latest)	5m 40s
Build and test (macos-14)	18m 41s
run memory profile	49s
Integration tests (macos-14)	7m 12s
Check web files	27s
Status Check	0s
	1h 46m 43s

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