Integrate LLVM to llvm/llvm-project@abbcebe65284 (#24704)

Integrates LLVM to llvm/llvm-project@abbcebe65284 . No additional
downstream LLVM fix commits were required.

Signed-off-by: Juan Pisula <juanigpisula@gmail.com>

third_party/llvm-project

diff --git a/third_party/llvm-project b/third_party/llvm-project
index 7db44cb..abbcebe 160000
--- a/third_party/llvm-project
+++ b/third_party/llvm-project
@@ -1 +1 @@
-Subproject commit 7db44cb429f3f73fd8e8b0e9c21a957cfb1b945c
+Subproject commit abbcebe652841d4854aa9f47ff2ac2885a00ba89