IDEA: Implement Fetch strategies for other possible handlers

Today we have many useful fetch strategies in GraphQL handlers. Most of them are basically based on how to handle HTTP requests. So it is possible to implement those in other handlers for example JSON Schema handler can have multiple `baseUrl`s defined with different combination of strategies.

https://www.graphql-mesh.com/docs/handlers/graphql#fetch-strategies-and-multiple-http-endpoints-for-the-same-source

Start with the linked Fetch strategies and multiple HTTP endpoints documentation for GraphQL handlers, then compare the existing strategies with the JSON Schema handler. Identify which other handlers could support multiple baseUrls and strategy combinations; done means the selected handlers provide equivalent fetch-strategy behavior.

Written by the indexing model from the issue text.