[lld] [llvm] [Object] Define ELFType::Endian as alias for TargetEndianness (PR #86604)

[James Henderson via llvm-commits]

https://github.com/jh7370 commented:

I know the aim is to shorten the name, but if I'm not mistaken, the term should be "Endianness". I'm pretty sure I've never seen the term "Endian" used outside the context of "big-endian" or "little-endian".

Also, if you want to shorten the name, why create a separate alias, rather than just renaming the original term?

https://github.com/llvm/llvm-project/pull/86604