Integrate LLVM at llvm/llvm-project@46396108deb2

Updates LLVM usage to match
[46396108deb2](https://github.com/llvm/llvm-project/commit/46396108deb2)

PiperOrigin-RevId: 583219072
Change-Id: I1e00e8fb3e6724030e29caa92afbf780bc810e88

bazel/llvm.bzl

diff --git a/bazel/llvm.bzl b/bazel/llvm.bzl
index bc7cd2a..832e438 100644
--- a/bazel/llvm.bzl
+++ b/bazel/llvm.bzl
@@ -58,7 +58,7 @@
     new_git_repository(
         name = "llvm-raw",
         build_file_content = "# empty",
-        commit = "865f54e501739f382d33866baebfd0f9aaad01bb",
+        commit = "LLVM_COMMIT_HASH_TO_BE_POPULATED_BY_COPYBARA",
         remote = "https://github.com/llvm/llvm-project.git",
     )