Support for certManager in helmChart and CLI

[pragmaticivan]

What would you like to be added: I would like to add a new property such as:

certificates:
  certManager:
    enabled: true

ref

Parameter	Type	Default	Description
certificates.certManager.caSecretName	string	"metrics-server-ca"	Secret name where the CA is stored (generatedby cert-manager or user given)
certificates.certManager.enabled	bool	false	Enables Cert-manager for certificate management
certificates.certManager.generateCA	bool	true	Generates a self-signed CA with Cert-manager. If generateCA is false, the secret with the CA has to be annotated with cert-manager.io/allow-direct-injection: "true"
certificates.certManager.secretTemplate	object	{}	Add labels/annotations to secrets created by Certificate resources docs
certificates.mountPath	string	"/certs"	Path where metrics-server TLS certificates are mounted
certificates.secretName	string	"metrics-server-certs"	Secret name to be mounted with metrics-server TLS certificates

This would integrate metrics-server with certManager automatically instead of providing caBundle manually.

KEDA templates for ref: https://github.com/kedacore/charts/tree/main/keda/templates/cert-manager

Why is this needed: To improve setup and operation.

/kind feature

[dashpole]

/assign @stevehipwell /triage accepted

[stevehipwell]

#1288 should cover this.