refactor(bigtable): Rename pinger to pingAndWarm (googleapis#12758)

Author: bhshkh

bigtable/bigtable.go

@@ -921,8 +921,8 @@ func handleExecuteStreamEnd(stream btpb.Bigtable_ExecuteQueryClient, trailerMD *
 	return nil
 }
 
-// Pinger pings the server and warms up the connection.
-func (c *Client) Pinger(ctx context.Context) (err error) {
+// PingAndWarm pings the server and warms up the connection.
+func (c *Client) PingAndWarm(ctx context.Context) (err error) {
 	md := metadata.Join(metadata.Pairs(
 		resourcePrefixHeader, c.fullInstanceName(),
 		requestParamsHeader, c.reqParamsHeaderValInstance(),

bigtable/integration_test.go

@@ -249,7 +249,7 @@ func TestIntegration_Pinger(t *testing.T) {
 	if !testEnv.Config().UseProd {
 		t.Skip("emulator doesn't support PingAndWarm")
 	}
-	if err := client.Pinger(ctx); err != nil {
+	if err := client.PingAndWarm(ctx); err != nil {
 		t.Fatalf("pinger failed. got %v, want %v", err, nil)
 	}