Add clang-format to gitpod (#4247)

.gitpod.dockerfile

@@ -1 +1,11 @@
 FROM gitpod/workspace-java-17:2023-07-20-19-56-24
+
+USER root
+
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends \
+  clang-format=1:14.0-55~exp2 \
+  && apt-get clean \
+  && rm -rf /var/lib/apt/lists/*
+
+USER gitpod

.gitpod.yml

@@ -6,3 +6,7 @@ tasks:
   - init: |
       mvn dependency:resolve
       mvn compile
+
+vscode:
+  extensions:
+    - xaver.clang-format