Add a `-C embed-binary=no` compiler option

[Zoxc]

It would be useful to ask rustc to not embed object code in a rlib when doing LTO. I suggest adding a -C embed-binary=no compiler option similar to -C embed-bitcode=no.

This would allow rust-lang/cargo#14575 to be fixed without incurring a compile time cost, as Cargo misuses -C linker-plugin-lto as a -C embed-binary=no option, which currently leads to miscompilations.

[bjorn3]

Maybe call it -Cembed-bitcode=only as either bitcode or object files need to be present.