Support separate metadata secret per cell if metadata deployed per cell

[gibizer]

Today the CellPasswordSelector only has Database selector.

nova-operator/api/v1beta1/common_types.go

Lines 117 to 123 in f844985

	type CellPasswordSelector struct {
	// +kubebuilder:validation:Optional
	// +kubebuilder:default="NovaCell0DatabasePassword"
	// CellDatabase - the name of the field to get the Cell DB password from
	// the Secret
	Database string `json:"database"`
	}

The metadata secret selector can only be specified globally on the Nova level

nova-operator/api/v1beta1/common_types.go

Lines 98 to 114 in f844985

	type PasswordSelector struct {
	// +kubebuilder:validation:Optional
	// +kubebuilder:default="NovaPassword"
	// Service - Selector to get the keystone service user password from the
	// Secret
	Service string `json:"service"`
	// +kubebuilder:validation:Optional
	// +kubebuilder:default="NovaAPIDatabasePassword"
	// APIDatabase - the name of the field to get the API DB password from the
	// Secret
	APIDatabase string `json:"apiDatabase"`
	// +kubebuilder:validation:Optional
	// +kubebuilder:default="MetadataSecret"
	// MetadataSecret - the name of the field to get the metadata secret from the
	// Secret
	MetadataSecret string `json:"metadataSecret"`
	}

We should support the metadata password selector on the cell level if the metadata is deployed per cell.

[gibizer]

#524 is better written.