[lld] [llvm] [DTLTO][LLD][COFF] Add support for Integrated Distributed ThinLTO (PR #148594)

[Fangrui Song via llvm-commits]

================
@@ -40,3 +39,37 @@ The command-line interface is as follows:
 Some LLD LTO options (e.g., ``--lto-sample-profile=<file>``) are supported.
 Currently, other options are silently accepted but do not have the intended
 effect. Support for such options will be expanded in the future.
+
+COFF LLD
+--------
+
+The command-line interface is as follows:
+
+- ``/thinlto-distributor:<path>``
----------------
MaskRay wrote:

It seems that most ThinLTO tests use the `-thinlto*` spelling. 

https://github.com/llvm/llvm-project/pull/148594