Auto merge of #118014 - keith:ks/remove-unnecessary-fembed-bitcode-us…

…age-now-that-it-s-deprecated, r=clubby789

Remove unnecessary -fembed-bitcode usage now that it's deprecated

This is a partial revert of 6d819a4 because rust-lang/cc-rs#812 removed this flag entirely, meaning we shouldn't have to pass this manually anymore