[build] add ib in image for out-of-the-box infiniband support (#6599)

[build] add ib so that multi-node support with infiniband can be supported out-of-the-box (#6599)

Dockerfile

@@ -168,7 +168,7 @@ RUN echo 'tzdata tzdata/Areas select America' | debconf-set-selections \
     && python3 --version
 
 RUN apt-get update -y \
-    && apt-get install -y python3-pip git curl
+    && apt-get install -y python3-pip git curl libibverbs-dev
 
 # Install pip s.t. it will be compatible with our PYTHON_VERSION
 RUN curl -sS https://bootstrap.pypa.io/get-pip.py | python${PYTHON_VERSION}