Analyze the impact of of using polymorphic labels in the standard library

[Marwes]

Polymorphic labels were added in #4388 with a couple of example function signatures that utilize the feature. To be able to change the stable builtins to use polymorphic labels we need to evaluate how large the fallout would be.

DOD:

• Provide alternate type signatures which use polymorphic labels for all builtins where it is useful (see Document what kind of type system features are lacking for builtin functions #4410 for an incomplete list)
• When the label polymorphism feature is enabled do the typechecking with these signatures that use labels
• Evaluate the impact by compiling a representative set of real-world queries to determine the regressions