Add ability to paste custom annotations to CRD in Helm chart

[EsDmitrii]

Hi!
I faced issues when tried to deploy redis-operator via ArgoCD

CustomResourceDefinition.apiextensions.k8s.io "redisfailovers.databases.spotahome.com" is invalid: metadata.annotations: Too long: must have at most 262144 bytes

To fix this issue I need to paste special annotation for ArgoCD.
I can't do this via values file, and I need to download chart locally, make changes and deploy.
I added ability to add special custom annotations via values.yaml file.

[ese]

Thanks!, Im happy to merge this if you merge with master and fix the conflicts

[EsDmitrii]

@ese Hi! Conflicts are fixed.

[liupeng0518]

merged this pr has err:

❯ helm upgrade --install redis-operator redis-operator/redis-operator --version 3.3.0                                                                                          ─╯
Error: failed to install CRD crds/databases.spotahome.com_redisfailovers.yaml: error parsing : error converting YAML to JSON: yaml: line 4: did not find expected node content
helm.go:84: [debug] error parsing : error converting YAML to JSON: yaml: line 4: did not find expected node content

[sergey-kudriavtsev]

@EsDmitrii Please check the work

[EsDmitrii]

sorry for the long response, I'm working on it