feat: make LazyLoadVersion validate InitialVersion the same as LoadVersion (backport #638)

[mergify]

This is an automatic backport of pull request #638 done by Mergify.
Cherry-pick of d8e1e38 has failed:

On branch mergify/bp/release/v0.19.x/pr-638
Your branch is up to date with 'origin/release/v0.19.x'.

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  (fix conflicts and run "git cherry-pick --continue")
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Changes to be committed:
	modified:   CHANGELOG.md
	modified:   mutable_tree.go
	modified:   nodedb.go

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   mutable_tree_test.go

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[tac0turtle]

@yihuang can you help with the tests, then I can merge and release

[yihuang]

@yihuang can you help with the tests, then I can merge and release

The issue is due to mistakes in #665, should be fixed with following patch:

diff --git a/iterator.go b/iterator.go
index 1ae5c8c..86495d7 100644
--- a/iterator.go
+++ b/iterator.go
@@ -324,11 +324,10 @@ func (iter *NodeIterator) Next(isSkipped bool) {
                iter.err = err
                return
        }
-       iter.nodesToVisit = append(iter.nodesToVisit, leftNode)
        rightNode, err := iter.ndb.GetNode(node.rightHash)
        if err != nil {
                iter.err = err
                return
        }
-       iter.nodesToVisit = append(iter.nodesToVisit, rightNode)
+       iter.nodesToVisit = append(iter.nodesToVisit, rightNode, leftNode)
 }

[yihuang]

the tests are fixed here: #672 @tac0turtle