Introduce BraveRpcService

[jrhee17]

Motivation:

The motivation for this PR is better described in #6084

The changeset in this PR attempts to:

• Expose ArmeriaHttpServerParser and ArmeriaRpcServerParser
  • By doing so, users can choose what information must be extracted from BraveService or BraveRpcService. This can provide more flexibility on whether to use only BraveService, only BraveRpcService, or both BraveService and BraveRpcService
• Introduce BraveRpcService which allows users to perform sampling or request/response parsing based on RpcRequest

Modifications:

• Added BraveRpcService. By default, armeria-specific tags/annotations recorded by BraveRpcService is the same as BraveService
• Exposed ArmeriaHttpServerParser and ArmeriaRpcServerParser to allow users to easily construct a RpcTracing or HttpTracing

Result:

• Users may use RpcRequest, RpcResponse to apply sampling/tags/annotations

[github-actions]

🔍 Build Scan® (commit: 42fa304)

Job name	Status	Build Scan®
build-ubicloud-standard-16-jdk-8	✅	https://ge.armeria.dev/s/gtqtdkydd6mp2
build-ubicloud-standard-16-jdk-21-snapshot-blockhound	✅	https://ge.armeria.dev/s/nmnltbduo7hb6
build-ubicloud-standard-16-jdk-17-min-java-17-coverage	❌ (failure)	https://ge.armeria.dev/s/27k2wyizg2dic
build-ubicloud-standard-16-jdk-17-min-java-11	❌ (failure)	https://ge.armeria.dev/s/6a7ar7gsrfw4w
build-ubicloud-standard-16-jdk-17-leak	✅	https://ge.armeria.dev/s/bakjya5l2jjqq
build-ubicloud-standard-16-jdk-11	✅	https://ge.armeria.dev/s/noti3dgw4jehy
build-macos-latest-jdk-21	✅	https://ge.armeria.dev/s/gk6npnzyp7aie

[ikhoon]

Question) Is it possible to share the common logic with BraveService by adding AbstractBraveService and extending it, as you did in AbstractMetricCollectingClient?

[ikhoon]

This abstraction is slightly different from what I had in mind.
Instead of enforcing the subclass to call serve0() after preprocessing, should we handle all processes in AbstractBraveService but delegate the domain-specific part to the subclasses?

What do you think of this direction?

abstract class AbstractBraveService<BI extends brave.Request, BO extends brave.Response, ...>

    abstract BI braveRequest(ServiceRequestContext ctx, I req);

    abstract BO braveResponse(ServiceRequestContext ctx, RequestLog log, BI braveReq);

    abstract Span handleReceive(BI braveReq);

    abstract void handleSend(BO response, Span span);

    @Override
    public final O serve(ServiceRequestContext ctx, I req) throws Exception {
        if (!ctx.config().transientServiceOptions().contains(TransientServiceOption.WITH_TRACING)) {
            return unwrap().serve(ctx, req);
        }
        final BI braveReq = braveRequest(ctx, req);
        final Span span = handleReceive(braveReq);
        ...
    }