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This PR fixes a bug introduced on 1.0.76 where TemplateLiteral normalization during Value processing would result in a StackOverflow when decoding a infinite TemplateLiteral pattern back into a TemplateLiteral.
The underlying problem is that in order to retain information about a TemplateLiteral having an infinite expansion (meaningful to the type system), that information MUST be encoded as a TemplateLiteral, but where the expectation from Value is that a decoded infinite TemplateLiteral pattern "should" return a terminating type (which would be TString)
This is a slight mismatch, so this PR introduces a TemplateLiteralDecodeUnsafe which may map TemplateLiteral -> TemplateLiteral (Identity) if the pattern is infinite. Will need to review this in later revisions.
Fixes #1510