[lld] [LLD, MachO] Default objc_relative_method_lists on MacOS11+/iOS14+ (PR #101360)

[via llvm-commits]

zeroomega wrote:

> > Build task link: https://ci.chromium.org/ui/p/fuchsia/builders/toolchain.ci/clang-mac-x64/b8740230069184308337/overview
> 
> @zeroomega - Do you happen to know if this failure happens with Mac-x64 only ? I tried repro-ing on Mac-arm64 but the test passed for me. I'm trying to verify weather #104081 fixed the underlying issue and we can re-commit this change.

We currently don't build and test lldb on mac-arm64 bot due to some dependency issues. But I can try #104081 with this default objc_relative_method_lists change and see if it breaks LLDB on mac-x64

https://github.com/llvm/llvm-project/pull/101360