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/import-conditions.html.ini

@@ -0,0 +1,48 @@
+[import-conditions.html]
+  [supports(display:block) is a valid import condition]
+    expected: FAIL
+
+  [supports((display:flex)) is a valid import condition]
+    expected: FAIL
+
+  [supports((display:block) and (display:flex)) is a valid import condition]
+    expected: FAIL
+
+  [supports((display:block) or (display:flex)) is a valid import condition]
+    expected: FAIL
+
+  [supports((display:block) or (foo:bar)) is a valid import condition]
+    expected: FAIL
+
+  [supports(display: block !important) is a valid import condition]
+    expected: FAIL
+
+  [supports(display:block) (width >= 0px) is a valid import condition]
+    expected: FAIL
+
+  [supports(selector(a)) is a valid import condition]
+    expected: FAIL
+
+  [supports(selector(p a)) is a valid import condition]
+    expected: FAIL
+
+  [supports(selector(p > a)) is a valid import condition]
+    expected: FAIL
+
+  [supports(selector(p + a)) is a valid import condition]
+    expected: FAIL
+
+  [supports(font-tech(color-COLRv1)) is a valid import condition]
+    expected: FAIL
+
+  [supports(font-format(opentype)) is a valid import condition]
+    expected: FAIL
+
+  [supports(font-format(woff)) is a valid import condition]
+    expected: FAIL
+
+  [layer(A.B) supports(font-format(opentype)) is a valid import condition]
+    expected: FAIL
+
+  [layer supports(selector(a)) is a valid import condition]
+    expected: FAIL