chore(pod_aff_perc): Adding the pod_aff_per/blast-radius for pod-level chaoas (#311)

Signed-off-by: shubhamchaudhary <shubham.chaudhary@mayadata.io>

charts/generic/pod-delete/experiment.yaml

@@ -55,16 +55,16 @@ spec:
     - name: RAMP_TIME
       value: ''
 
-    # provide the kill count
-    - name: KILL_COUNT
-      value: ''
-
     - name: FORCE
       value: 'true'
 
     - name: CHAOS_INTERVAL
       value: '5'
 
+    ## percentage of total pods to target
+    - name: PODS_AFFECTED_PERC
+      value: ''
+
     - name: LIB
       value: 'litmus'