LibWeb: Fix style updates for table box nodes

On style update, we have to preserve the invariant established when we
built the layout tree - some properties are applied to the table wrapper
and the table box values are reset to their initial values.

This also ensures that the containing block of a table box is always a
table wrapper, which isn't the case if we set absolute position on the
box instead of the wrapper.

Fixes #19452.

Tests/LibWeb/Layout/input/table/propagate-style-update-to-wrapper.html

@@ -0,0 +1,12 @@
+<table id="t">
+    <tr>
+        <td></td>
+    </tr>
+</table>
+
+<script>
+    t = document.querySelector("#t");
+    console.log(t);
+    t.style.position = "absolute";
+    window.getComputedStyle(t);
+</script>