core-io.jar contains unrelocated io.opentracing classes

Suggested release note:

Removed the unrelocated `io.opentracing` classes that accidentally slipped into version 2.4.9 of the Couchbase `core-io` library.

Commit 37a82f5e656bb added a relocated version of `opentelemetry-grpc` to core-io-deps. It also accidentally added opentelemetry as a transitive depenedency, which the shade plugin was bundling into the core-io JAR.