Enable more css tests (#31469)

* Enable more css tests

In particular, these directories are no longer skipped:
 - CSS1 (has no tests)
 - css-box (except margin-trim)
 - css-cascade
 - css-display (except run-in)
 - css-easing
 - css-env
 - css-lists
 - css-namespaces
 - css-overflow
 - css-pseudo
 - css-sizing (except aspect-ratio and contain-intrinsic-size)
 - css-syntax
 - reference
 - support (has no tests)

* Sort list properly

* Explicitly list skipped directories

* Do not skip css tests by default

* Add expectations

tests/wpt/meta/css/css-display/display-math-on-non-mathml-elements.html.ini

@@ -0,0 +1,15 @@
+[display-math-on-non-mathml-elements.html]
+  [computed display on <div style="display: math;">]
+    expected: FAIL
+
+  [computed display on <div style="display: inline math;">]
+    expected: FAIL
+
+  [computed display on <div style="display: math inline;">]
+    expected: FAIL
+
+  [computed display on <svg style="display: block math;">]
+    expected: FAIL
+
+  [computed display on <svg style="display: math block;">]
+    expected: FAIL