[nri-bundle] enable KSM and kube-events by default, use custom labels for bundled KSM

[roobre]

KSM is a mandatory dependency of the infrastructure chart, which is enabled by default. Despite this, KSM was not. This PR makes two changes:

1. Enable KSM by default
2. Change the name of the bundled KSM to a nrk8s specific one. This will make autodiscovery to pick the KSM we bundle by default, rather than other KSMs in the cluster.

⚠️ Breaking changes

KSM

Users who were using their own KSM will need to adjust the selector to the default KSM label:

newrelic-infrastructure:
  ksm:
    config:
      selector: "app.kubernetes.io/name=kube-state-metrics"

nri-kube-events

nri-kube-events is now enabled by default, following what the guided install was already doing.

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• Chart Version bumped
• Variables are documented in the README.md
• Title of the PR starts with chart name (e.g. [mychartname])

[gsanchezgavier]

LGTM

[paologallinaharbur]

@roobre Can we merge this?

[paologallinaharbur]

I rolled back enabling nri-kube-events in order to reduce the scope of the changes.

This is going to be an hotfix on the top of 5.0.0 and no longer a breaking change