Add jvm_thread metrics (#5129)

Subproject commit 24788cf41807048dcbe8dba0958688aaaf630d73

Subproject commit 61550492d82de2bfd71c6f43cb6b7d3251fa9d76

import org.apache.skywalking.apm.agent.core.jvm.gc.GCProvider;

import org.apache.skywalking.apm.agent.core.jvm.memory.MemoryProvider;

import org.apache.skywalking.apm.agent.core.jvm.memorypool.MemoryPoolProvider;

import org.apache.skywalking.apm.agent.core.jvm.thread.ThreadProvider;

import org.apache.skywalking.apm.agent.core.logging.api.ILog;

import org.apache.skywalking.apm.agent.core.logging.api.LogManager;

import org.apache.skywalking.apm.agent.core.remote.GRPCChannelListener;

            jvmBuilder.addAllMemory(MemoryProvider.INSTANCE.getMemoryMetricList());

            jvmBuilder.addAllMemoryPool(MemoryPoolProvider.INSTANCE.getMemoryPoolMetricsList());

            jvmBuilder.addAllGc(GCProvider.INSTANCE.getGCList());

            jvmBuilder.setThread(ThreadProvider.INSTANCE.getThreadMetrics());

            JVMMetric jvmMetric = jvmBuilder.build();

            if (!queue.offer(jvmMetric)) {

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 * this work for additional information regarding copyright ownership.

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package org.apache.skywalking.apm.agent.core.jvm.thread;

import java.lang.management.ManagementFactory;

import java.lang.management.ThreadMXBean;

import org.apache.skywalking.apm.network.language.agent.v3.Thread;

public enum ThreadProvider {

    INSTANCE;

    private final ThreadMXBean threadMXBean;

    ThreadProvider() {

        this.threadMXBean = ManagementFactory.getThreadMXBean();

    }

    public Thread getThreadMetrics() {

        int threadCount = threadMXBean.getThreadCount();

        int daemonThreadCount = threadMXBean.getDaemonThreadCount();

        int peakThreadCount = threadMXBean.getPeakThreadCount();

        return Thread.newBuilder().setLiveCount(threadCount)

                .setDaemonCount(daemonThreadCount)

                .setPeakCount(peakThreadCount).build();

    }

}

| time | GC time cost | | long |

| count | Count of GC op | | long |

5. SCOPE `ServiceInstanceJVMThread`

| Name | Remarks | Group Key | Type | 

|---|---|---|---|

| id | Represent the unique id of the service instance, usually a number. | yes | int |

| name |  Represent the name of the service instance. Such as `ip:port@Service Name`.  **Notice**: current native agent uses `processId@Service name` as instance name, which is useless when you want to setup a filter in aggregation. | | string|

| serviceName | Represent the name of the service. | | string |

| liveCount | Represent Current number of live threads | | int |

| daemonCount | Represent Current number of daemon threads | | int |

| peakCount | Represent Current number of peak threads | | int |

### SCOPE `Endpoint`

Calculate the metrics data from each request of the endpoint in the service. 

SRC_SERVICE_INSTANCE_JVM_MEMORY: 'ServiceInstanceJVMMemory';

SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL: 'ServiceInstanceJVMMemoryPool';

SRC_SERVICE_INSTANCE_JVM_GC: 'ServiceInstanceJVMGC';

SRC_SERVICE_INSTANCE_JVM_THREAD: 'ServiceInstanceJVMThread';

SRC_DATABASE_ACCESS: 'DatabaseAccess';

SRC_SERVICE_INSTANCE_CLR_CPU: 'ServiceInstanceCLRCPU';

SRC_SERVICE_INSTANCE_CLR_GC: 'ServiceInstanceCLRGC';