Replace ghccc with `preserve_none` in JIT builds

[savannahostrowski]

Now that we are going to be updating the JIT to use LLVM 19 (see #124093), we can use the preserve_none attribute which exposes ghccc to the compiler instead of manually patching in the calling convention in LLVM IR and then compiling that. Additionally, preserve_none supports both x86-64 and AArch64 targets.

Will need to see what happens with 32-bit Windows during CI.

Linked PRs

• gh-125498: Update JIT builds to use LLVM 19 and use preserve_none #125499