Merge bitcoin/bitcoin#30639: ci: Use clang-19 in msan tasks

ccccb67 ci: Use clang-19 in msan tasks (MarcoFalke)

Pull request description:

  A new clang version generally comes with bugfixes, new sanitizer features, deprecations, as well as new features.

  Upgrade the memory sanitizer tasks to use the new version.

  (Ref bitcoin/bitcoin#30634)

ACKs for top commit:
  fanquake:
    ACK ccccb67 Tested both jobs on aarch64, and one on x86_64 with `mmap_rnd_bits`.

Tree-SHA512: a42bf2da7c08aa54c0c5ab3811ff51b98b80b276be135eed32395a55ae93a42d41d7cd32c307062dcca711a892958ea141168c2a06025560074f8c5d20190946

ci/test/01_base_install.sh

@@ -36,7 +36,7 @@ if [ -n "$PIP_PACKAGES" ]; then
 fi
 
 if [[ ${USE_MEMORY_SANITIZER} == "true" ]]; then
-  ${CI_RETRY_EXE} git clone --depth=1 https://github.com/llvm/llvm-project -b "llvmorg-18.1.3" /msan/llvm-project
+  ${CI_RETRY_EXE} git clone --depth=1 https://github.com/llvm/llvm-project -b "llvmorg-19.1.0" /msan/llvm-project
 
   cmake -G Ninja -B /msan/clang_build/ \
     -DLLVM_ENABLE_PROJECTS="clang" \