build: update the securityContext of direct mount container

update securityContext to runAsUser: 0
so container can run as a root user

Signed-off-by: parth-gr <paarora@redhat.com>
(cherry picked from commit bc355c6)

deploy/examples/direct-mount.yaml

@@ -18,15 +18,9 @@ spec:
       dnsPolicy: ClusterFirstWithHostNet
       containers:
         - name: rook-direct-mount
-<<<<<<< HEAD
           image: rook/ceph:v1.8.0
-          command: ["/tini"]
-          args: ["-g", "--", "/usr/local/bin/toolbox.sh"]
-=======
-          image: rook/ceph:master
           command: ["/bin/bash"]
           args: ["-m", "-c", "/usr/local/bin/toolbox.sh"]
->>>>>>> bd3e558c2 (build: updating tini init command in direct mount toolbox)
           imagePullPolicy: IfNotPresent
           tty: true
           env:
@@ -42,6 +36,7 @@ spec:
                   key: ceph-secret
           securityContext:
             privileged: true
+            runAsUser: 0
           volumeMounts:
             - mountPath: /dev
               name: dev