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-legacy-layout/css/cssom/serialize-values.html.ini

@@ -0,0 +1,141 @@
+[serialize-values.html]
+  [content: url("http://localhost/")]
+    expected: FAIL
+
+  [content: url(http://localhost/)]
+    expected: FAIL
+
+  [content: counter(par-num, upper-roman)]
+    expected: FAIL
+
+  [content: attr(foo-bar)]
+    expected: FAIL
+
+  [content: attr(foo_bar)]
+    expected: FAIL
+
+  [list-style-type: decimal-leading-zero]
+    expected: FAIL
+
+  [list-style-type: lower-roman]
+    expected: FAIL
+
+  [list-style-type: upper-roman]
+    expected: FAIL
+
+  [list-style-type: lower-latin]
+    expected: FAIL
+
+  [list-style-type: upper-latin]
+    expected: FAIL
+
+  [list-style-type: armenian]
+    expected: FAIL
+
+  [list-style-type: georgian]
+    expected: FAIL
+
+  [orphans: 101]
+    expected: FAIL
+
+  [orphans: inherit]
+    expected: FAIL
+
+  [outline-color: invert]
+    expected: FAIL
+
+  [page-break-after: auto]
+    expected: FAIL
+
+  [page-break-after: always]
+    expected: FAIL
+
+  [page-break-after: avoid]
+    expected: FAIL
+
+  [page-break-after: left]
+    expected: FAIL
+
+  [page-break-after: right]
+    expected: FAIL
+
+  [page-break-after: inherit]
+    expected: FAIL
+
+  [page-break-before: auto]
+    expected: FAIL
+
+  [page-break-before: always]
+    expected: FAIL
+
+  [page-break-before: avoid]
+    expected: FAIL
+
+  [page-break-before: left]
+    expected: FAIL
+
+  [page-break-before: right]
+    expected: FAIL
+
+  [page-break-before: inherit]
+    expected: FAIL
+
+  [page-break-inside: avoid]
+    expected: FAIL
+
+  [page-break-inside: auto]
+    expected: FAIL
+
+  [page-break-inside: inherit]
+    expected: FAIL
+
+  [widows: 101]
+    expected: FAIL
+
+  [widows: inherit]
+    expected: FAIL
+
+  [background-position: 5% center]
+    expected: FAIL
+
+  [background-position: .5% center]
+    expected: FAIL
+
+  [background-position: -5% center]
+    expected: FAIL
+
+  [background-position: -.5% center]
+    expected: FAIL
+
+  [background-position: 0px center]
+    expected: FAIL
+
+  [background-position: 1px center]
+    expected: FAIL
+
+  [background-position: .1em center]
+    expected: FAIL
+
+  [background-position: -0px center]
+    expected: FAIL
+
+  [background-position: -1px center]
+    expected: FAIL
+
+  [background-position: -.1em center]
+    expected: FAIL
+
+  [background-position: left center]
+    expected: FAIL
+
+  [background-position: center top]
+    expected: FAIL
+
+  [background-position: center center]
+    expected: FAIL
+
+  [background-position: center bottom]
+    expected: FAIL
+
+  [background-position: right center]
+    expected: FAIL