feat: support EDF

方案描述：
1、liteos_a调度框架支持EDF调度算法，默认优先调度EDF策略的任务
2、用户态musl_c库适配新增调度算法，同步修改相关接口以支持用户态创建EDF进程与线程

BREAKING CHANGE:
support EDF对外变更描述：
以下接口支持SCHED_DEADLINE调度策略:
pthread_attr_getschedparam
pthread_attr_setschedparam
pthread_getschedparam
pthread_setschedparam
pthread_create
sched_getscheduler
sched_getparam
sched_setparam
sched_setscheduler

Close：#I6T3P3

Signed-off-by: zhangdengyu <zhangdengyu2@huawei.com>
Change-Id: Ic9fe6896fcae42ae4ee7fe5dfb8e858a6ed19740

testsuites/unittest/net/socket/smoke/net_socket_test_011.cpp

@@ -181,6 +181,9 @@ static int StartClients(pthread_t *cli, int cliNum)
     for (int i = 0; i < cliNum; ++i) {
         ret = pthread_attr_init(&attr);
         param.sched_priority = param.sched_priority + 1;
+        if (param.sched_priority > 31) {    /* 31: prio */
+            param.sched_priority = 31;  /* 31: prio */
+        }
         pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
         pthread_attr_setschedparam(&attr, &param);