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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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We should collect the count of no provider available exception in MetricsFilter.

With: `RpcException.isNoInvokerAvailableAfterFilter()`

private String group;
    private String version;
    private RpcInvocation invocation;
    private String side;
    public static MethodMetric getTestMethodMetric() {
        MethodMetric methodMetric = new MethodMetric();
        methodMetric.setApplicationName("TestApp");
        methodMetric.setInterfaceName("TestInterface");
        methodMetric.setMethodName("TestMethod");
        methodMetric.setGroup("TestGroup");
        methodMetric.setVersion("1.0.0");
        methodMetric.setSide("PROVIDER");
        return methodMetric;
    }
    public static AggregateMetricsCollector getTestCollector() {
        ApplicationModel applicationModel = mock(ApplicationModel.class);
        ConfigManager configManager = new ConfigManager(applicationModel);
        MetricsConfig metricsConfig = spy(new MetricsConfig());
        configManager.setMetrics(metricsConfig);
        when(metricsConfig.getAggregation()).thenReturn(new AggregationConfig());
        when(applicationModel.getApplicationConfigManager()).thenReturn(configManager);
        ScopeBeanFactory beanFactory = mock(ScopeBeanFactory.class);
        when(beanFactory.getBean(DefaultMetricsCollector.class)).thenReturn(new DefaultMetricsCollector());
        when(applicationModel.getBeanFactory()).thenReturn(beanFactory);
        return new AggregateMetricsCollector(applicationModel);
    }
    @BeforeEach
    public void setup() {
        ApplicationConfig config = new ApplicationConfig();
        config.setName("MockMetrics");