[ELF] -r: don't parse @ (symbol versioning) for .symver inline asm in bitcode

Fixes PR46420
Similar to D43307 for non-LTO.

Module-level inline assembly can use .symver to create a symbol with `@` in the name.
For relocatable output, @ should be retained in the symbol name. `@ver` should
not be parsed and dropped.

Reviewed By: grimar, psmith

Differential Revision: https://reviews.llvm.org/D82433