GCP Label Selector Experiment Charts and GCP Experiments Refactor (#532)

* added gcp-vm-instance-stop-by-label charts

Signed-off-by: neelanjan00 <neelanjan@chaosnative.com>

* updated experiment charts

Signed-off-by: neelanjan00 <neelanjan@chaosnative.com>

* added gcp-vm-disk-loss-by-label-charts; updated gcp-vm-disk-loss and gcp-vm-instance-stop charts to add sequence to engine manifest and removed device name from gcp-vm-disk-loss manifests

Signed-off-by: neelanjan00 <neelanjan@chaosnative.com>

* finalised charts

Signed-off-by: neelanjan00 <neelanjan@chaosnative.com>

* updated chart comments

Signed-off-by: neelanjan00 <neelanjan@chaosnative.com>

* updated AUTO_SCALING_GROUP env to MANAGED_INSTANCE_GROUP env

Signed-off-by: neelanjan00 <neelanjan@chaosnative.com>

* finalised charts for all GCP experiments

Signed-off-by: neelanjan00 <neelanjan@chaosnative.com>

* updated provider and author details in gcp-vm-instance-stop-by-label experiment

Signed-off-by: neelanjan00 <neelanjan@chaosnative.com>

* updated docs links

Signed-off-by: Neelanjan Manna <neelanjan.manna@harness.io>

* removed pods/exec rbac, updated keywords

Signed-off-by: Neelanjan Manna <neelanjan.manna@harness.io>

* updated chartserviceversion, package

Signed-off-by: Neelanjan Manna <neelanjan.manna@harness.io>

Co-authored-by: Udit Gaurav <35391335+uditgaurav@users.noreply.github.com>

charts/gcp/gcp.chartserviceversion.yaml

@@ -12,16 +12,19 @@ spec:
   experiments:
   - gcp-vm-instance-stop
   - gcp-vm-disk-loss
+  - gcp-vm-instance-stop-by-label
+  - gcp-vm-disk-loss-by-label
   keywords: 
     - "VM"
     - "Disk"
     - "GCP"
+    - "Infra"
   maintainers: 
     - name: Neelanjan Manna 
-      email: neelanjan@chaosnative.com
+      email: neelanjan.manna@harness.io
   minKubeVersion: 1.12.0 
   provider: 
-    name: ChaosNative
+    name: Harness
   links: 
     - name: GCP Website
       url: https://cloud.google.com/