Encryption: Add support for data keys re-encryption (#43548)

* Encryption: Add support for data keys re-encryption

* Add tests for data keys re-encryption

* Update code after refactorings

Co-authored-by: Leonard Gram <leo@xlson.com>

pkg/services/secrets/secrets.go

@@ -24,6 +24,8 @@ type Service interface {
 	DecryptJsonData(ctx context.Context, sjd map[string][]byte) (map[string]string, error)
 
 	GetDecryptedValue(ctx context.Context, sjd map[string][]byte, key, fallback string) string
+
+	ReEncryptDataKeys(ctx context.Context) error
 }
 
 // Store defines methods to interact with secrets storage
@@ -33,6 +35,7 @@ type Store interface {
 	CreateDataKey(ctx context.Context, dataKey DataKey) error
 	CreateDataKeyWithDBSession(ctx context.Context, dataKey DataKey, sess *xorm.Session) error
 	DeleteDataKey(ctx context.Context, name string) error
+	ReEncryptDataKeys(ctx context.Context, providers map[ProviderID]Provider, currProvider ProviderID) error
 }
 
 // Provider is a key encryption key provider for envelope encryption