Kops update monitoring group node to use the latest monitoring module

[vijay-veeranki]

This is related to ticket

This change created an affinity key to use for both EKS and KOPS.

For kops to use the latest monitoring module(1.7.6), kops monitoring node group should have a new tag created here

tag to be added:
cloud-platform.justice.gov.uk/monitoring-ng: true.

Once the tag is applied to kops, apply the latest module(1.7.6) of monitoring to kops components.

This will enable affinity.

## Assign custom affinity rules to the prometheus instance
## ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/

AC:

New tags were created to kops and the latest monitoring module applied to kops.
Promotheus still shows up in monitoring node group

[poornima-krishnasamy]

There is one more release made for the monitoring module. https://github.com/ministryofjustice/cloud-platform-terraform-monitoring/releases/tag/1.7.7. This ticket needs to be completed before 1.7.7 can go on the kops clusters.

[davidread]

This is about making live-1 consistent with live.