Provide a way to find dynamic decorators handling the current request

[ikhoon]

Motivation:

HttpService.as(Class) can be used to unwrap and find an instance of a decorator or a service. ServiceRequestContext.config().service().as(Class) can't find all decorators because decorators set with ServerBuilder.decorator() don't statically wrap the services.

I propose to add ServiceRequestContext.findService(Class) for finding both dynamic and static decorators handling a request.

Modifications:

• Add ServiceRequestContext.findService(Class) that gets all service chain from InitialDispatcherService and finds the specific service.

Result:

You can now easily find both dynamic and static decorators that handle a request by using ServiceRequestContext.findService(Class).

[github-actions[bot]]

🔍 Build Scan® (commit: aba621968e8eb38a206d0e6404ecb40eea9ff544)

Job name	Status	Build Scan®
build-windows-latest-jdk-21	✅	https://ge.armeria.dev/s/q2f6utrid47gy
build-self-hosted-unsafe-jdk-8	✅	https://ge.armeria.dev/s/pyu2pacvwfc4u
build-self-hosted-unsafe-jdk-21-snapshot-blockhound	✅	https://ge.armeria.dev/s/3cfbhprhoylyy
build-self-hosted-unsafe-jdk-17-min-java-17-coverage	✅	https://ge.armeria.dev/s/y4i5h5cht7zo2
build-self-hosted-unsafe-jdk-17-min-java-11	✅	https://ge.armeria.dev/s/7f3l3xphqggqy
build-self-hosted-unsafe-jdk-17-leak	✅	https://ge.armeria.dev/s/uhvzhlnskz7xe
build-self-hosted-unsafe-jdk-11	✅	https://ge.armeria.dev/s/pvnmuvrkstvpg
build-macos-12-jdk-21	✅	https://ge.armeria.dev/s/dg7qtcaa6duxg