[CP] revert round out of entity pass bounds. (#51425)

Cherry pick revert of https://github.com/flutter/engine/pull/51395
diff --git a/impeller/entity/entity_pass.cc b/impeller/entity/entity_pass.cc
index 061b38d..5aad257 100644
--- a/impeller/entity/entity_pass.cc
+++ b/impeller/entity/entity_pass.cc
@@ -597,8 +597,6 @@
       return EntityPass::EntityResult::Skip();
     }
 
-    subpass_coverage = Rect::RoundOut(subpass_coverage.value());
-
     auto subpass_size = ISize(subpass_coverage->GetSize());
     if (subpass_size.IsEmpty()) {
       capture.CreateChild("Subpass Entity (Skipped: Empty subpass coverage B)");