[BUILD] Clang-Cl fails to build due to RootNode.h ValueT aliasing

[bgottamd]

Environment

Operating System: Windows 11
Version / Commit SHA: 45d2ce4
CMake Version: 3.28
Compiler: clang-cl

Describe the problem

When compiling with clang-cl the inner ValueT in the convertValue function reports an use of undeclared identifier ValueT error in RootNode.h

To Reproduce

The below example fails compile due to this issue. Boost may cause issues when compiling with clang but that can be fixed using this boost pull req.

#include <openvdb/openvdb.h>
#include <openvdb/tree/RootNode.h>
#include <openvdb/tree/InternalNode.h>
#include <iostream>

int main()
{
    openvdb::initialize();
    using FloatRootNodeType = openvdb::tree::RootNode<openvdb::tree::InternalNode<openvdb::tree::InternalNode<openvdb::tree::LeafNode<float, 3>, 4>, 5>>;
    FloatRootNodeType floatRoot;
    using IntRootNodeType = openvdb::tree::RootNode<openvdb::tree::InternalNode<openvdb::tree::InternalNode<openvdb::tree::LeafNode<int, 3>, 4>, 5>>;
    IntRootNodeType intRoot;
    openvdb::Coord xyz(0, 0, 0);
    intRoot = floatRoot;
    return 0;
}