Chart enchantments

[jkroepke]

• Add ServiceMonitor
• Allow namespaced RBAC (works in combination with namespace on config)
• Allow to configure customized RBAC rules (fixes ClusterRole rules are too permissive #75)
• Ensure that chart labels are defined on each object
• Ensure that kubernetes-event-exporter is restarted, if the config has been changes (https://helm.sh/docs/howto/charts_tips_and_tricks/#automatically-roll-deployments)
• Set kubernetes hardening by default
• Allow to define imagePullSecrets and image.registry form Values.global
• Add topologySpreadConstraints property
• Add extraVolumes and extraVolumeMounts (useful for manual AWS IRSA setup)
• Add deploymentAnnotations, deploymentLabels and podLabels (useful or reloader)
• Set namespaceOverride to empty by default.

[jkroepke]

@mustafaakin I would appreciate a review here, since you do #54

[jacobredesign]

This looks great @jkroepke , was looking for this functionality regarding namespaces as our kube hosting provider doesn't give us cluster level api access so things like clusterroles are a non-starter.

[jkroepke]

@jacobredesign great that it l ooks good ob your side, too. 👍

@resmoio what did you think?

[jkroepke]

@mustafaakin should I split this PR into smaller pieces?

[miai10]

Does this MR fix this bug: #106 ?

[jkroepke]

@miai10 The issues was recently introduced but this MR would also fix the issue you mentioned.

[jkroepke]

@jacobredesign @resmoio @mustafaakin I would appreciate a review here.