build: run versions command in the slim stage (#5127)

Move the invocation of the command to build the linter versions file in
the slim stage because we run it again in the standard stage anyway, so
there's no need for the standard stage to wait for this command to run.

Dockerfile

@@ -394,13 +394,13 @@ COPY TEMPLATES /action/lib/.automation
 #################################
 COPY lib /action/lib
 
-# Run to build version file and validate image
-RUN ACTIONS_RUNNER_DEBUG=true WRITE_LINTER_VERSIONS_FILE=true IMAGE="${IMAGE}" /action/lib/linter.sh
-
 ENTRYPOINT ["/action/lib/linter.sh"]
 
 FROM base_image as slim
 
+# Run to build version file and validate image
+RUN ACTIONS_RUNNER_DEBUG=true WRITE_LINTER_VERSIONS_FILE=true IMAGE="${IMAGE}" /action/lib/linter.sh
+
 # Set build metadata here so we don't invalidate the container image cache if we
 # change the values of these arguments
 ARG BUILD_DATE