Add MigrateRequestConfig

[SiBorea]

What's changed?

I created a MigrateRequestConfig recipe for RequestConfig, it maybe complicated to finish.
Currently only RequestConfig.Builder.setStaleConnectionCheckEnabled(false) is migrated.

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[SiBorea]

@timtebeek Do you have any better idea for line 103 and 144. I suppose this isn't a good way to insert a new variable.

[github-actions]

Some suggestions could not be made:

• src/main/java/org/openrewrite/apache/httpclient5/UsernamePasswordCredentials.java
  • lines 28-29

[timtebeek]

That was a neat puzzle there @SiBorea ! To fix most of the type validation issues I've flipped around the order as compared to what you had before; now we first create a new PoolingHttpClientConnectionManager in visitMethodDeclaration (if needed), and then pass that down into visitMethodInvocation in case we need to call setConnectionManager there. I couldn't fully resolve the type issues just yet due to the mix of HC4 and HC5 classes, but I think this is good enough for now. Thanks again for the extensive tests; they make refactoring easy. 🙏🏻