fix(turbo-tasks): Implement ValueDebugFormat for ResolvedVc (#71173)
Caught this missing implementation when the codemod in #71172 tried to
convert this test to use `ResolvedVc`.
This implementation just forwards to the one on `Vc`.
I don't think we need an explicit test case for `Vc` inside of a struct,
because the plan is to codemod away virtually every instance of this.
Co-authored-by: Niklas Mischkulnig <4586894+mischnic@users.noreply.github.com>