layout: Add incremental box tree construction for table caption (#37849)

This change extends incremental box tree updates to table captions. In
addition, calls to `LayoutBox::invalidate_cached_fragment()` are moved
to the damage calculation traversal.

Testing: This should not change observable behavior and is thus covered
by existing WPT tests.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Oriol Brufau <obrufau@igalia.com>

components/layout/flow/construct.rs

@@ -700,7 +700,6 @@ impl BlockLevelJob<'_> {
                 },
                 None => None,
             } {
-                block_level_box.borrow().invalidate_cached_fragment();
                 return block_level_box;
             }
         }