Fix readnone attribute for llvm 16 #7152
Merged
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The readnone flag was changed to memory(none) when applied to functions. llvm-as dynamically upgrades readnone applied to functions, so our .ll is fine for now, but there were places in the compiler we were manually sticking 'readnone' on a function.
Also did a driveby makefile fix to remove some vestigial wasm stuff that was throwing errors with newer versions of llvm-config