[Improvement] Use environment variable $DOLPHINSCHEDULE_OPTS as daemon startup arguments (#4341)

Co-authored-by: hailin0 <hailin0@yeah.net>

script/dolphinscheduler-daemon.sh

@@ -94,7 +94,7 @@ else
   exit 1
 fi
 
-export DOLPHINSCHEDULER_OPTS="-server -Xms$HEAP_INITIAL_SIZE -Xmx$HEAP_MAX_SIZE -Xmn$HEAP_NEW_GENERATION__SIZE -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=128m  -Xss512k -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:LargePageSizeInBytes=128m -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 -XX:+PrintGCDetails -Xloggc:gc.log -XX:+HeapDumpOnOutOfMemoryError  -XX:HeapDumpPath=dump.hprof"
+export DOLPHINSCHEDULER_OPTS="-server -Xms$HEAP_INITIAL_SIZE -Xmx$HEAP_MAX_SIZE -Xmn$HEAP_NEW_GENERATION__SIZE -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=128m  -Xss512k -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:LargePageSizeInBytes=128m -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 -XX:+PrintGCDetails -Xloggc:gc.log -XX:+HeapDumpOnOutOfMemoryError  -XX:HeapDumpPath=dump.hprof $DOLPHINSCHEDULER_OPTS"
 
 case $startStop in
   (start)