`pkgimages` cannot include / pre-compile certain code (☔ umbrella issue)

[topolarity]

Missing support for serializing / adding code in a pkgimage:

• Pkgimages cannot add machine code for previously-inlined CodeInstances #58465
• cfunction ABI adapters not pre-compiled for CodeInstances from an existing sys/pkgimage #58758
• Code already inferred before @compile_workload is not tagged for pre-compilation #58960

These are a few places where we'd like to be able to ahead-of-time compile code, but the serializer doesn't quite support it.