* Refactor TypeInstrumentation#transformers() method part 1
Add TypeInstrumentation and its implementations
* Refactor TypeInstrumentation#transformers() method part 2
Use the new method in all existing TypeInstrumentation implementations
* Drift
* Spotless
Co-authored-by: Trask Stalnaker <trask.stalnaker@gmail.com>
* testing-common refactoring: replace direct AgentTestRunner usage with spock spec
* Updated instrumentation docs
* Fix reactor-core library tests
ReactorCoreTest was getting a tracer from GlobalOpenTelemetry before LibraryTestTrait had a change to initialize the SDK