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- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.

## Describe the proposal
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EN:
Observability task, optimizing thread pool index embedding function
1 Need to specify a name for the core thread pool
2 Core thread pool index is not effective
3. Remove the frame-level indicators and only keep the core monitoring indicators (the frame-level code type is completely deleted and will be considered later)

可观测性任务，优化线程池指标埋点功能
1需要为核心线程池指定名称
2核心线程池指标生效问题
3移除框架层指标只保留核心监控指标
synchronized (startLock) {
            if (isStopping() || isStopped() || isFailed()) {
                throw new IllegalStateException(getIdentifier() + " is stopping or stopped, can not start again");
            }
            try {
                
                boolean hasPendingModule = hasPendingModule();
                if (isStarting()) {
                    
                    
                    if (hasPendingModule) {
                        startModules();
                    }
                    
                    return startFuture;
                }
                
                if (isStarted() && !hasPendingModule) {
                    return CompletableFuture.completedFuture(false);
                }
                
                
                onStarting();
                initialize();
                doStart();
            } catch (Throwable e) {
                onFailed(getIdentifier() + " start failure", e);
                throw e;
            }
            return startFuture;