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/css/css-align/parsing/align-content-computed.html.ini

@@ -0,0 +1,42 @@
+[align-content-computed.html]
+  [Property align-content value 'normal']
+    expected: FAIL
+
+  [Property align-content value 'baseline']
+    expected: FAIL
+
+  [Property align-content value 'last baseline']
+    expected: FAIL
+
+  [Property align-content value 'space-between']
+    expected: FAIL
+
+  [Property align-content value 'space-around']
+    expected: FAIL
+
+  [Property align-content value 'space-evenly']
+    expected: FAIL
+
+  [Property align-content value 'stretch']
+    expected: FAIL
+
+  [Property align-content value 'center']
+    expected: FAIL
+
+  [Property align-content value 'start']
+    expected: FAIL
+
+  [Property align-content value 'end']
+    expected: FAIL
+
+  [Property align-content value 'flex-start']
+    expected: FAIL
+
+  [Property align-content value 'flex-end']
+    expected: FAIL
+
+  [Property align-content value 'unsafe end']
+    expected: FAIL
+
+  [Property align-content value 'safe flex-start']
+    expected: FAIL