trie/utils: change Div+Mod to DivMod (#29413)

* trie/utils: change Div+Mod to DivMod

* trie/utils: gofmt

Author: AaronChen0

trie/utils/verkle.go

@@ -206,9 +206,8 @@ func CodeSizeKey(address []byte) []byte {
 
 func codeChunkIndex(chunk *uint256.Int) (*uint256.Int, byte) {
 	var (
-		chunkOffset = new(uint256.Int).Add(codeOffset, chunk)
-		treeIndex   = new(uint256.Int).Div(chunkOffset, verkleNodeWidth)
-		subIndexMod = new(uint256.Int).Mod(chunkOffset, verkleNodeWidth)
+		chunkOffset            = new(uint256.Int).Add(codeOffset, chunk)
+		treeIndex, subIndexMod = new(uint256.Int).DivMod(chunkOffset, verkleNodeWidth, new(uint256.Int))
 	)
 	var subIndex byte
 	if len(subIndexMod) != 0 {