[TD-10700]<enhance>: The escape char backstick can be used for both tag name and column name

src/client/src/tscSQLParser.c

@@ -6607,7 +6607,7 @@ int32_t validateColumnName(char* name) {
 
     return validateColumnName(token.z);
   } else if (token.type == TK_ID) {
-    tscRmEscapeAndTrimToken(&token);
+    strRmquoteEscape(name, token.n);
     return TSDB_CODE_SUCCESS;
   } else {
     if (isNumber(&token)) {
@@ -7728,6 +7728,10 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
           tscDequoteAndTrimToken(sToken);
         }
 
+        if (TK_ID == sToken->type) {
+          tscRmEscapeAndTrimToken(sToken);
+        }
+
         tVariantListItem* pItem = taosArrayGet(pValList, i);
 
         findColumnIndex = false;

src/util/src/tutil.c

@@ -91,6 +91,7 @@ int32_t strRmquoteEscape(char *z, int32_t len) {
     return strRmquote(z, len);
   } else if (len > 1 && z[0] == TS_ESCAPE_CHAR && z[len - 1] == TS_ESCAPE_CHAR) {
     memmove(z, z + 1, len - 2);
+    z[len - 2] = '\0';
     return len - 2;
   }