Rename metadata directories

This renames:
 - `tests/wpt/metadata` → `tests/wpt/meta-legacy-layout`
 - `tests/wpt/metadata-layout-2020` → `tests/wpt/meta`
 - `tests/wpt/mozilla/meta` → `tests/wpt/mozilla/meta-legacy-layout`
 - `tests/wpt/mozilla/meta-layout-2020` → `tests/wpt/mozilla/meta`

tests/wpt/meta/custom-elements/state/tentative/ElementInternals-states.html.ini

@@ -0,0 +1,22 @@
+[ElementInternals-states.html]
+  [DOMTokenList behavior of ElementInternals.states: Initial state]
+    expected: FAIL
+
+  [DOMTokenList behavior of ElementInternals.states: Exceptions]
+    expected: FAIL
+
+  [DOMTokenList behavior of ElementInternals.states: Modifications]
+    expected: FAIL
+
+  [CustomStateSet behavior of ElementInternals.states: Exceptions]
+    expected: FAIL
+
+  [CustomStateSet behavior of ElementInternals.states: Initial state]
+    expected: FAIL
+
+  [CustomStateSet behavior of ElementInternals.states: Modifications]
+    expected: FAIL
+
+  [Updating a CustomStateSet while iterating it should work]
+    expected: FAIL
+

tests/wpt/meta/custom-elements/state/tentative/state-pseudo-class.html.ini

@@ -0,0 +1,34 @@
+[state-pseudo-class.html]
+  [:state() and :host()]
+    expected: FAIL
+
+  [:state() and ::part()]
+    expected: FAIL
+
+  [:state() in simple cases]
+    expected: FAIL
+
+  [:state() and other pseudo classes]
+    expected: FAIL
+
+  [:state() serialization]
+    expected: FAIL
+
+  [:--foo in simple cases]
+    expected: FAIL
+
+  [:--foo serialization]
+    expected: FAIL
+
+  [:--foo parsing passes]
+    expected: FAIL
+
+  [:--foo and :host()]
+    expected: FAIL
+
+  [:--foo and other pseudo classes]
+    expected: FAIL
+
+  [:--foo and ::part()]
+    expected: FAIL
+