goenv: parse patch version, add func Compare to compare two Go version strings #4536
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This PR implements 3 changes:
goenv.Parse
now parses patch version out of a Go version string.goenv.Compare
to compare two Go version strings. This is used in compiler: conform to latest iteration of wasm types proposal #4501 to enablestructs.HostLayout
enforcement.Parse
andCompare
.Extracted from #4501.