Move testgrid-config-upload job inside testgrid dir, and use --json
Move testgrid-config-upload job inside testgrid dir, and use --json

GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid