[2022.3] Fix Deprecated API Warning

[TrevorDaschOculus]

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Purpose of this PR

Why is this PR needed, what hard problem is it solving/fixing?

Fix deprecated API warning by passing motion vector color and depth RTs as RTHandles instead of RenderTargetIdentifiers

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Testing status

Describe what manual/automated tests were performed for this PR

Built and ran on Quest with AppSW Enabled, verified MotionVectors were rendered as expected

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