docker: install libclang-16-dev for woboq code browser

Otherwise you will get the following error:

    CMake Error at /usr/lib/llvm-16/lib/cmake/clang/ClangTargets.cmake:792 (message):
      The imported target "clangBasic" references the file

         "/usr/lib/llvm-16/lib/libclangBasic.a"

      but this file does not exist.  Possible reasons include:

      * The file was deleted, renamed, or moved to another location.

      * An install or uninstall procedure did not complete successfully.

      * The installation package was faulty and contained

         "/usr/lib/llvm-16/lib/cmake/clang/ClangTargets.cmake"

      but not all the files it references.

    Call Stack (most recent call first):
      /usr/lib/llvm-16/lib/cmake/clang/ClangConfig.cmake:20 (include)
      generator/CMakeLists.txt:7 (Find_Package)

Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>

docker/test/util/Dockerfile

@@ -52,6 +52,7 @@ RUN apt-get update \
         lld-${LLVM_VERSION} \
         llvm-${LLVM_VERSION} \
         llvm-${LLVM_VERSION}-dev \
+        libclang-${LLVM_VERSION}-dev \
         moreutils \
         nasm \
         ninja-build \