[dxvk] Store new image view when deferring clear/discard with matching subresources

Otherwise, if the view used for the second clear has a different format than
the first one, we'll end up clearing to the wrong colur. Assumes that images
with more than one aspect never have views with mismatching formats.

Also potentially improves logic around render pass clears depending on usage
patterns.

src/dxvk/dxvk_context.cpp

@@ -1857,6 +1857,7 @@ namespace dxvk {
           VkClearValue              clearValue) {
     for (auto& entry : m_deferredClears) {
       if (entry.imageView->checkSubresourceMatch(imageView)) {
+        entry.imageView = imageView;
         entry.discardAspects &= ~clearAspects;
         entry.clearAspects |= clearAspects;
 
@@ -1883,6 +1884,7 @@ namespace dxvk {
           VkImageAspectFlags        discardAspects) {
     for (auto& entry : m_deferredClears) {
       if (entry.imageView->checkSubresourceMatch(imageView)) {
+        entry.imageView = imageView;
         entry.discardAspects |= discardAspects;
         entry.clearAspects &= ~discardAspects;
         return;