Plugins: Update missed ConversionHandler checks (#92011)

pkg/plugins/backendplugin/coreplugin/core_plugin.go

@@ -145,7 +145,7 @@ func (cp *corePlugin) ValidateAdmission(ctx context.Context, req *backend.Admiss
 }
 
 func (cp *corePlugin) ConvertObjects(ctx context.Context, req *backend.ConversionRequest) (*backend.ConversionResponse, error) {
-	if cp.AdmissionHandler != nil {
+	if cp.ConversionHandler != nil {
 		ctx = backend.WithGrafanaConfig(ctx, req.PluginContext.GrafanaConfig)
 		return cp.ConversionHandler.ConvertObjects(ctx, req)
 	}

pkg/tests/api/plugins/backendplugin/backendplugin_test.go

@@ -955,7 +955,7 @@ func (tp *testPlugin) MutateAdmission(ctx context.Context, req *backend.Admissio
 
 // ConvertObject implements backend.AdmissionHandler.
 func (tp *testPlugin) ConvertObjects(ctx context.Context, req *backend.ConversionRequest) (*backend.ConversionResponse, error) {
-	if tp.AdmissionHandler != nil {
+	if tp.ConversionHandler != nil {
 		return tp.ConversionHandler.ConvertObjects(ctx, req)
 	}