use root for controller manager cause we need to access csi plugins sock (#2505)

Signed-off-by: Jeff <zw0948@gmail.com>

build/ks-controller-manager/Dockerfile

@@ -2,19 +2,11 @@
 # Use of this source code is governed by an Apache license
 # that can be found in the LICENSE file.
 FROM alpine:3.11
-ENV USER=kubesphere
-ENV UID=1002
-# docker group
-ENV GID=998
 
 COPY  /bin/cmd/controller-manager /usr/local/bin/
 
-RUN apk add --no-cache ca-certificates && \
-    addgroup --gid "$GID" "$USER" && \
-    adduser -D -g "" --ingroup "$USER" -u "$UID" "$USER" && \
-    chown -R kubesphere:"$GID" /usr/local/bin/controller-manager
+RUN apk add --no-cache ca-certificates
 
 EXPOSE 8443 8080
 
-USER kubesphere
 CMD ["sh"]