Secrets: encryption encryption storage uses versioning (#108036)

* Secrets: delete unused FakeKeeper

* Secrets: encrypted value storage stores versions

* add version to span

* trigger build

* remove ineffectual assignment

* lint

* drop secret_encrypted_value.uid / add name and version columns

pkg/storage/secret/encryption/encrypted_value_model.go

@@ -3,8 +3,9 @@ package encryption
 import "github.com/grafana/grafana/pkg/storage/secret/migrator"
 
 type EncryptedValue struct {
-	UID           string
 	Namespace     string
+	Name          string
+	Version       int64
 	EncryptedData []byte
 	Created       int64
 	Updated       int64