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-cascade/scope-nesting.html.ini

@@ -0,0 +1,48 @@
+[scope-nesting.html]
+  [Implicit :scope in <scope-end>]
+    expected: FAIL
+
+  [Relative selectors in <scope-end>]
+    expected: FAIL
+
+  [Nesting-selector in the scope's <stylesheet>]
+    expected: FAIL
+
+  [Nesting-selector within :scope rule]
+    expected: FAIL
+
+  [Nesting-selector within :scope rule (double nested)]
+    expected: FAIL
+
+  [@scope nested within style rule]
+    expected: FAIL
+
+  [Parent pseudo class within scope-start]
+    expected: FAIL
+
+  [Parent pseudo class within scope-end]
+    expected: FAIL
+
+  [Parent pseudo class within body of nested @scope]
+    expected: FAIL
+
+  [Implicit rule within nested @scope ]
+    expected: FAIL
+
+  [Implicit rule within nested @scope (proximity)]
+    expected: FAIL
+
+  [Nested :scope inside an :is]
+    expected: FAIL
+
+  [:scope within nested and scoped rule]
+    expected: FAIL
+
+  [:scope within nested and scoped rule (implied &)]
+    expected: FAIL
+
+  [:scope within nested and scoped rule (relative)]
+    expected: FAIL
+
+  [Scoped nested group rule]
+    expected: FAIL