Add comments to newJindoEngineRT in pkg/ddc/jindo/runtime_info_test.go

[baoheipojis]

Which function do you want to add comments to?
newJindoEngineRT in pkg/ddc/jindo/runtime_info_test.go

What comments do you want to add?

// newJindoEngineRT creates a new JindoEngine instance for testing.
// It initializes the engine with a default JindoRuntime and a null logger.
// When withRuntimeInfo is true, it also builds and assigns the runtimeInfo using the
// provided name, namespace, and common.JindoRuntime type. This helper is used in tests to
// simulate different runtime configurations.