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-flexbox/abspos/position-absolute-012.html.ini

@@ -0,0 +1,216 @@
+[position-absolute-012.html]
+  [.flexbox 38]
+    expected: FAIL
+
+  [.flexbox 39]
+    expected: FAIL
+
+  [.flexbox 35]
+    expected: FAIL
+
+  [.flexbox 36]
+    expected: FAIL
+
+  [.flexbox 37]
+    expected: FAIL
+
+  [.flexbox 30]
+    expected: FAIL
+
+  [.flexbox 32]
+    expected: FAIL
+
+  [.flexbox 33]
+    expected: FAIL
+
+  [.flexbox 88]
+    expected: FAIL
+
+  [.flexbox 80]
+    expected: FAIL
+
+  [.flexbox 83]
+    expected: FAIL
+
+  [.flexbox 82]
+    expected: FAIL
+
+  [.flexbox 85]
+    expected: FAIL
+
+  [.flexbox 84]
+    expected: FAIL
+
+  [.flexbox 86]
+    expected: FAIL
+
+  [.flexbox 16]
+    expected: FAIL
+
+  [.flexbox 14]
+    expected: FAIL
+
+  [.flexbox 12]
+    expected: FAIL
+
+  [.flexbox 13]
+    expected: FAIL
+
+  [.flexbox 10]
+    expected: FAIL
+
+  [.flexbox 11]
+    expected: FAIL
+
+  [.flexbox 18]
+    expected: FAIL
+
+  [.flexbox 19]
+    expected: FAIL
+
+  [.flexbox 96]
+    expected: FAIL
+
+  [.flexbox 94]
+    expected: FAIL
+
+  [.flexbox 92]
+    expected: FAIL
+
+  [.flexbox 93]
+    expected: FAIL
+
+  [.flexbox 90]
+    expected: FAIL
+
+  [.flexbox 91]
+    expected: FAIL
+
+  [.flexbox 63]
+    expected: FAIL
+
+  [.flexbox 62]
+    expected: FAIL
+
+  [.flexbox 61]
+    expected: FAIL
+
+  [.flexbox 60]
+    expected: FAIL
+
+  [.flexbox 67]
+    expected: FAIL
+
+  [.flexbox 66]
+    expected: FAIL
+
+  [.flexbox 69]
+    expected: FAIL
+
+  [.flexbox 68]
+    expected: FAIL
+
+  [.flexbox 70]
+    expected: FAIL
+
+  [.flexbox 72]
+    expected: FAIL
+
+  [.flexbox 74]
+    expected: FAIL
+
+  [.flexbox 75]
+    expected: FAIL
+
+  [.flexbox 76]
+    expected: FAIL
+
+  [.flexbox 77]
+    expected: FAIL
+
+  [.flexbox 78]
+    expected: FAIL
+
+  [.flexbox 45]
+    expected: FAIL
+
+  [.flexbox 44]
+    expected: FAIL
+
+  [.flexbox 47]
+    expected: FAIL
+
+  [.flexbox 46]
+    expected: FAIL
+
+  [.flexbox 41]
+    expected: FAIL
+
+  [.flexbox 43]
+    expected: FAIL
+
+  [.flexbox 49]
+    expected: FAIL
+
+  [.flexbox 4]
+    expected: FAIL
+
+  [.flexbox 5]
+    expected: FAIL
+
+  [.flexbox 6]
+    expected: FAIL
+
+  [.flexbox 2]
+    expected: FAIL
+
+  [.flexbox 3]
+    expected: FAIL
+
+  [.flexbox 8]
+    expected: FAIL
+
+  [.flexbox 59]
+    expected: FAIL
+
+  [.flexbox 52]
+    expected: FAIL
+
+  [.flexbox 53]
+    expected: FAIL
+
+  [.flexbox 51]
+    expected: FAIL
+
+  [.flexbox 57]
+    expected: FAIL
+
+  [.flexbox 54]
+    expected: FAIL
+
+  [.flexbox 55]
+    expected: FAIL
+
+  [.flexbox 29]
+    expected: FAIL
+
+  [.flexbox 28]
+    expected: FAIL
+
+  [.flexbox 27]
+    expected: FAIL
+
+  [.flexbox 26]
+    expected: FAIL
+
+  [.flexbox 24]
+    expected: FAIL
+
+  [.flexbox 22]
+    expected: FAIL
+
+  [.flexbox 21]
+    expected: FAIL
+
+  [.flexbox 20]
+    expected: FAIL