SecretsManager: Add base encryption manager (#107562)

Co-authored-by: Michael Mandrus <michael.mandrus@grafana.com>
Co-authored-by: Matheus Macabu <macabu@users.noreply.github.com>

pkg/registry/apis/secret/encryption/cipher/cipher.go

@@ -4,11 +4,6 @@ import (
 	"context"
 )
 
-const (
-	AesCfb = "aes-cfb"
-	AesGcm = "aes-gcm"
-)
-
 type Cipher interface {
 	Encrypter
 	Decrypter
@@ -21,8 +16,3 @@ type Encrypter interface {
 type Decrypter interface {
 	Decrypt(ctx context.Context, payload []byte, secret string) ([]byte, error)
 }
-
-type Provider interface {
-	ProvideCiphers() map[string]Encrypter
-	ProvideDeciphers() map[string]Decrypter
-}