[lld-macho] Don't emit rebase opcodes for relocs in TLV sections

Their addresses are already encoded as section-relative offsets, so
there's no need to rebase them at runtime. {D85080} has some context
on the weirdness of TLV sections.

Fixes llvm.org/PR48491.

Reviewed By: #lld-macho, thakis

Differential Revision: https://reviews.llvm.org/D93257