Adding instrumentation support for Ratpack 2.x version

[NaveenRamu]

As suggested in the Git issue, I have copied the 1.7 instrumentation module and aligned the imports to Ratpack 2.x.

Questions:

1. How will the changes be pushed to the opentelemetry-java-instrumentation repo, as I don't have permission to push them?
2. If I don't receive permission to push the changes, how can I use these changes and write manual instrumentation (since manual instrumentation requires SDK and API dependencies)?

[steverao]

Duplicate problem with #12962