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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
}
            environment.setDynamicConfiguration(compositeDynamicConfiguration);
        }
    }
    private void startMetadataCenter() {
        useRegistryAsMetadataCenterIfNecessary();
        ApplicationConfig applicationConfig = getApplication();
        String metadataType = applicationConfig.getMetadataType();
        
        Collection<MetadataReportConfig> metadataReportConfigs = configManager.getMetadataConfigs();
        if (CollectionUtils.isEmpty(metadataReportConfigs)) {
            if (REMOTE_METADATA_STORAGE_TYPE.equals(metadataType)) {
                throw new IllegalStateException("No MetadataConfig found, Metadata Center address is required when 'metadata=remote' is enabled.");
            }
            return;
        }
        MetadataReportInstance metadataReportInstance = applicationModel.getBeanFactory().getBean(MetadataReportInstance.class);
        List<MetadataReportConfig> validMetadataReportConfigs = new ArrayList<>(metadataReportConfigs.size());
        for (MetadataReportConfig metadataReportConfig : metadataReportConfigs) {
            if (ConfigValidationUtils.isValidMetadataConfig(metadataReportConfig)) {
                ConfigValidationUtils.validateMetadataConfig(metadataReportConfig);
                validMetadataReportConfigs.add(metadataReportConfig);
            }
        }
        metadataReportInstance.init(validMetadataReportConfigs);
        if (!metadataReportInstance.inited()) {
            throw new IllegalStateException(String.format("%s MetadataConfigs found, but none of them is valid.", metadataReportConfigs.size()));
        }
    }
    /**