chore(new_experiment): Add charts for disk io stress experiment (#318)

Signed-off-by: Udit Gaurav <udit.gaurav@mayadata.io>

charts/generic/node-io-stress/experiment.yaml

@@ -0,0 +1,83 @@
+apiVersion: litmuschaos.io/v1alpha1
+description:
+  message: |
+    Give a memory hog on a node belonging to a deployment
+kind: ChaosExperiment
+metadata:
+  name: node-io-stress
+spec:
+  definition:
+    scope: Cluster
+    permissions:
+      - apiGroups:
+          - ""
+          - "batch"
+          - "apps"
+          - "litmuschaos.io"
+        resources:
+          - "jobs"
+          - "pods"
+          - "pods/log"
+          - "events"
+          - "chaosengines"
+          - "chaosexperiments"
+          - "chaosresults"
+        verbs:
+          - "create"
+          - "list"
+          - "get"
+          - "patch"
+          - "update"
+          - "delete"
+      - apiGroups:
+          - ""
+        resources: 
+          - "nodes"
+        verbs:
+          - "get"
+          - "list"
+    image: "litmuschaos/go-runner:latest"
+    imagePullPolicy: Always
+    args:
+    - -c
+    - ./experiments/node-io-stress
+    command:
+    - /bin/bash
+    env:
+
+    - name: TOTAL_CHAOS_DURATION
+      value: '120'
+
+    ## specify the size as percentage of free space on the file system
+    ## default value 90 (in percentage)
+    - name: FILESSYSTEM_UTILIZATION_PERCENTAGE
+      value: '10'
+
+    ## we can specify the size in Gigabyte (Gb) also in place of percentage of free space
+    ## NOTE: for selecting this option FILESSYSTEM_UTILIZATION_PERCENTAGE should be empty
+    - name: FILESSYSTEM_UTILIZATION_BYTES
+      value: ''
+
+    ## Total number of workers default value is 4
+    - name: NUMBER_OF_WORKERS
+      value: '4'    
+
+    ## enter the name of the desired node
+    - name: APP_NODE
+      value: ''    
+
+    # Period to wait before and after injection of chaos in sec
+    - name: RAMP_TIME
+      value: ''
+
+    # Provide the LIB here
+    # Only litmus supported
+    - name: LIB
+      value: 'litmus'
+
+    # provide lib image
+    - name: LIB_IMAGE
+      value: 'litmuschaos/go-runner:latest' 
+      
+    labels:
+      name: node-io-stress