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/metadata/secure_value_store.go

@@ -197,6 +197,7 @@ func (s *secureValueMetadataStorage) getLatestVersion(ctx context.Context, names
 	return &version, nil
 }
 
+// TODO: can this method + queries be removed?
 func (s *secureValueMetadataStorage) ReadForDecrypt(ctx context.Context, namespace xkube.Namespace, name string) (*contracts.DecryptSecureValue, error) {
 	start := time.Now()
 	ctx, span := s.tracer.Start(ctx, "SecureValueMetadataStorage.ReadForDecrypt", trace.WithAttributes(