Fix canonicalization of associated types #3277

Job	Run time
Determine compiler version from git tag	1s
Ubuntu dev container/Debug	30m 50s
Native: macos-13/debug/Ninja	35m 27s
Ubuntu dev container/Release	20m 23s
Native: macos-13/debug/Xcode	15m 45s
Native: macos-13/release/Ninja	27m 48s
Native: macos-13/release/Xcode	12m 35s
Native: ubuntu-latest/debug/Ninja	30m 43s
Native: ubuntu-latest/release/Ninja	19m 39s
Native: windows-latest/debug/Ninja	11m 17s
Native: windows-latest/release/Ninja	16m 53s
	3h 41m 21s

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