[lld] [LLD][COFF] Use EC symbol table for CHPE metadata (PR #120328)

[Jacek Caban via llvm-commits]

cjacek wrote:

Depends on #120326.

According to my testing, MSVC handles this by copying the value from the EC load configuration to the native one. This approach allows tests to be updated to use load configurations correctly on ARM64X by relying on a regular native ARM64 load configuration without CHPE metadata.

https://github.com/llvm/llvm-project/pull/120328