Access Health check endpoint for each LitAPI independently

[aniketmaurya]

I want to be able to check health of each LitAPI separately

1. localhost:8000/LITAPI_NAME_1/health
2. localhost:8000/LITAPI_NAME_1/health

Originally posted by @aniketmaurya in #604 (comment)

[selfsff]

LitServe has multi endpoint, so you can create api for sending request to /health in other apis, that my way to resolve it, you can come up with another