util: enable golang profiling

Add support for golang profiling.
Standard tools like go tool pprof and curl
work. example:
$ go tool pprof http://localhost:8080/debug/pprof/profile
$ go tool pprof http://localhost:8080/debug/pprof/heap
$ curl http://localhost:8080/debug/pprof/heap?debug=1

https://golang.org/pkg/net/http/pprof/ contains
more details about the pprof interface.

Fixes: #1699

Signed-off-by: Yati Padia <ypadia@redhat.com>

charts/ceph-csi-rbd/templates/nodeplugin-daemonset.yaml

@@ -73,6 +73,9 @@ spec:
             - "--drivername=$(DRIVER_NAME)"
 {{- if .Values.topology.enabled }}
             - "--domainlabels={{ .Values.topology.domainLabels | join "," }}"
+{{- end }}
+{{- if .Values.nodeplugin.profiling.enabled }}
+            - "--enableprofiling={{ .Values.nodeplugin.profiling.enabled }}"
 {{- end }}
           env:
             - name: POD_IP

charts/ceph-csi-rbd/templates/provisioner-deployment.yaml

@@ -142,6 +142,9 @@ spec:
             {{- if .Values.provisioner.skipForceFlatten }}
             - "--skipforceflatten={{ .Values.provisioner.skipForceFlatten }}"
             {{- end }}
+            {{- if .Values.provisioner.profiling.enabled }}
+            - "--enableprofiling={{ .Values.provisioner.profiling.enabled }}"
+            {{- end }}
           env:
             - name: POD_IP
               valueFrom: