unified-storage: reuse index if RV is set even if it is outdated (#110184)

* unified-storage: reuse index if RV is set even if it is outdated and searchAfterWrite FF is enabled

pkg/storage/unified/testing/benchmark.go

@@ -217,7 +217,7 @@ func runSearchBackendBenchmarkWriteThroughput(ctx context.Context, backend resou
 	size := int64(10000) // force the index to be on disk
 	index, err := backend.BuildIndex(ctx, nr, size, 0, nil, "benchmark", func(index resource.ResourceIndex) (int64, error) {
 		return 0, nil
-	}, nil)
+	}, nil, false, false)
 	if err != nil {
 		return nil, fmt.Errorf("failed to initialize backend: %w", err)
 	}

pkg/storage/unified/testing/search_backend.go

@@ -86,7 +86,7 @@ func runTestSearchBackendBuildIndex(t *testing.T, backend resource.SearchBackend
 			return 0, err
 		}
 		return 1, nil
-	}, nil)
+	}, nil, false, false)
 	require.NoError(t, err)
 	require.NotNil(t, index)
 
@@ -152,7 +152,7 @@ func runTestResourceIndex(t *testing.T, backend resource.SearchBackend, nsPrefix
 		})
 		require.NoError(t, err)
 		return int64(2), nil
-	}, nil)
+	}, nil, false, false)
 	require.NoError(t, err)
 	require.NotNil(t, index)
 
@@ -294,7 +294,7 @@ func runTestResourceIndex(t *testing.T, backend resource.SearchBackend, nsPrefix
 			})
 			require.NoError(t, err)
 			return int64(3), nil
-		}, nil)
+		}, nil, false, false)
 		require.NoError(t, err)
 		require.NotNil(t, index)