Integrate llvm 20240412 (#17031)

diff --git a/third_party/llvm-project b/third_party/llvm-project
index 56954a5..6f1e23b 160000
--- a/third_party/llvm-project
+++ b/third_party/llvm-project
@@ -1 +1 @@
-Subproject commit 56954a53e58282d7584e31ec14a2b1052cd861e8
+Subproject commit 6f1e23b47d428d792866993ed26f4173d479d43d