layout: Add initial support for row height distribution (#31421)

This change adds a version of row height distribution that follows the
distribtuion algorithm used for tables in Blink's LayoutNG. This is just
an intermediate step toward implementing a distribution algorithm for
both rows and columns more similar to Layout NG.

The CSS Table 3 specification is often wrong with regard to web
compatability, which is why we have abandoned it in favor of the Layout
NG algorithm for row height distribution.  this work.

Co-authored-by: Oriol Brufau <obrufau@igalia.com>

tests/wpt/meta/css/css-tables/column-track-merging.html.ini

@@ -2,9 +2,6 @@
   [main table 1]
     expected: FAIL
 
-  [main table 2]
-    expected: FAIL
-
   [main table 4]
     expected: FAIL
 
@@ -31,3 +28,6 @@
 
   [main table 3]
     expected: FAIL
+
+  [main table 2]
+    expected: FAIL