refactor: support submitreq2

source/dnode/vnode/inc/vnode.h

@@ -221,7 +221,7 @@ typedef struct SSnapContext {
 } SSnapContext;
 
 typedef struct STqReader {
-  const SSubmitReq *pMsg;
+  // const SSubmitReq *pMsg;
   //   SSubmitBlk       *pBlock;
   //   SSubmitMsgIter    msgIter;
   //   SSubmitBlkIter    blkIter;

source/dnode/vnode/src/tq/tq.c

@@ -673,10 +673,8 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg) {
               req.epoch, TD_VID(pTq->pVnode), fetchVer, pHead->msgType);
 
       if (pHead->msgType == TDMT_VND_SUBMIT) {
-        SSubmitReq* pCont = (SSubmitReq*)&pHead->body;
-
         SPackedSubmit submit = {
-            .msgStr = pCont,
+            .msgStr = pHead->body,
             .msgLen = pHead->bodyLen,
             .ver = pHead->version,
         };