[services] Add text ml rayservice yaml

[zcin]

Why are these changes needed?

Related issue number

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • This PR is not tested :(

[kevin85421]

1. What's the difference between text_ml and https://github.com/ray-project/serve_config_examples/tree/master/text_summarizer?

2. Is torch necessary? torch is not imported explicitly in https://github.com/ray-project/serve_config_examples/blob/master/text_ml.py.

[zcin]

1. What's the difference between text_ml and https://github.com/ray-project/serve_config_examples/tree/master/text_summarizer?
2. Is torch necessary? torch is not imported explicitly in https://github.com/ray-project/serve_config_examples/blob/master/text_ml.py.

1. It is a model composition application, there are two separate deployments in one application, Translator and Summarizer
2. torch is required