WIP: Add optional NaN canonicalization #4261

Job	Run time
Clippy	1m 4s
Audit	9s
Coverage	4m 0s
Build	1m 30s
Documentation	15s
Formatting	13s
Fuzz (translate)	2m 48s
Check mininum supported Rust version	20s
Fuzz (translate_metered)	2m 41s
Fuzz (execute)	2m 42s
Miri (spec)	6m 3s
Miri	6m 59s
Fuzz (differential)	3m 7s
Test (ubuntu-latest)	1m 19s
Test (windows-latest)	3m 12s
Test (Address Sanitizer)	2m 39s
Test (macos-latest)	1m 34s
uDeps	1m 12s
	41m 47s

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