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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
MetadataReportConfig metadataReportConfig = originMetadataReportConfig == null ?
            new MetadataReportConfig(registryConfig.getApplicationModel()) : originMetadataReportConfig;
        if (metadataReportConfig.getId() == null) {
            metadataReportConfig.setId(registryConfig.getId());
        }
        metadataReportConfig.setScopeModel(applicationModel);
        if (metadataReportConfig.getParameters() == null) {
            metadataReportConfig.setParameters(new HashMap<>());
        }
        if (CollectionUtils.isNotEmptyMap(registryConfig.getParameters())) {
            for (Map.Entry<String, String> entry : registryConfig.getParameters().entrySet()) {
                metadataReportConfig.getParameters().putIfAbsent(entry.getKey(), entry.getValue()); 
            }
        }
        metadataReportConfig.getParameters().put(CLIENT_KEY, registryConfig.getClient());
        if (metadataReportConfig.getGroup() == null) {
            metadataReportConfig.setGroup(registryConfig.getGroup());
        }
        if (metadataReportConfig.getAddress() == null) {
            metadataReportConfig.setAddress(getRegistryCompatibleAddress(registryConfig));
        }
        if (metadataReportConfig.getUsername() == null) {
            metadataReportConfig.setUsername(registryConfig.getUsername());
        }
        if (metadataReportConfig.getPassword() == null) {
            metadataReportConfig.setPassword(registryConfig.getPassword());
        }
        if (metadataReportConfig.getTimeout() == null) {
            metadataReportConfig.setTimeout(registryConfig.getTimeout());
        }