[Bugifx:Autograding] symlink for clang (#59)

### What is the new behavior?

add a symlink for clang

---------

Co-authored-by: Barb Cutler <Barb Cutler>

Author: bmcutler

dockerfiles/clang/14/Dockerfile

@@ -5,5 +5,6 @@ RUN apt-get update
 RUN apt-get install -y clang-14 lld-14
 RUN rm -rf /var/lib/apt/lists/*
 
-# symlink
-RUN ln -s /usr/bin/clang++-14 /usr/bin/clang++
+# symlinks
+RUN ln -s /usr/bin/clang++-14 /usr/bin/clang++
+RUN ln -s /usr/bin/clang-14 /usr/bin/clang