Integrate LLVM at llvm/llvm-project@d553243fe4b5

Updates LLVM usage to match
[d553243fe4b5](https://github.com/llvm/llvm-project/commit/d553243fe4b5)

PiperOrigin-RevId: 346393264

SUBMODULE_VERSIONS

diff --git a/SUBMODULE_VERSIONS b/SUBMODULE_VERSIONS
index 1a0ca46..4475e30 100644
--- a/SUBMODULE_VERSIONS
+++ b/SUBMODULE_VERSIONS
@@ -5,7 +5,7 @@
 4fb0ff7069bd88ee85902f4d0bb62794e5f6d021 third_party/flatcc
 b1fbd33c06cdb0024c67733c6fdec2009d17b384 third_party/googletest
 bfc60e6cfe4d298f1662042f21f55c0ddd409749 third_party/llvm-bazel
-a1344779ab019a6bcd29842c1499343e15efbe87 third_party/llvm-project
+d553243fe4b5e1992c07aff7b54b16160a4d5e97 third_party/llvm-project
 55801f03f9cc69abfcf8b508a873f702c11b3b5f third_party/mlir-emitc
 74d7261be17cf659d5930d4830609406bd7553e3 third_party/pffft
 d8c7ee00a687ac369e62e2032514a93a9b413502 third_party/pybind11