Integrate llvm-project @56069ab1a35e74d0d8d632121e1891d41cb56a2d (#17862)

Drop reverted commits:


https://github.com/llvm/llvm-project/commit/fe82af3d2d9b0487e281b9349c61d2831594469f

https://github.com/llvm/llvm-project/commit/4a7695e8d2aefa57e2beb4013dad0300333f6d16

---------

Signed-off-by: yzhang93 <zhyuhang88@gmail.com>

third_party/llvm-project

diff --git a/third_party/llvm-project b/third_party/llvm-project
index fe82af3..c9f6518 160000
--- a/third_party/llvm-project
+++ b/third_party/llvm-project
@@ -1 +1 @@
-Subproject commit fe82af3d2d9b0487e281b9349c61d2831594469f
+Subproject commit c9f6518f742c88bda309d5331e0a5d4664387f94