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/css-values/minmax-integer-computed.html.ini

@@ -0,0 +1,61 @@
+[minmax-integer-computed.html]
+  [Property z-index value 'min(1.1, max(0.4, 0.6))' computes to '1']
+    expected: FAIL
+
+  [Property z-index value 'max(1)' computes to '1']
+    expected: FAIL
+
+  [Property z-index value 'max(0.4)' computes to '0']
+    expected: FAIL
+
+  [Property z-index value 'min(0.6)' computes to '1']
+    expected: FAIL
+
+  [Property z-index value 'max(0.3, min(1.1, 0.4))' computes to '0']
+    expected: FAIL
+
+  [Property z-index value 'max(0.6)' computes to '1']
+    expected: FAIL
+
+  [Property z-index value 'min(1)' computes to '1']
+    expected: FAIL
+
+  [Property z-index value 'calc(max(0.3, 0.6) / 2)' computes to '0']
+    expected: FAIL
+
+  [Property z-index value 'min(0.4)' computes to '0']
+    expected: FAIL
+
+  [Property z-index value 'calc(min(0.3, 0.6) * 2)' computes to '1']
+    expected: FAIL
+
+  [Property z-index value 'max(0.4)']
+    expected: FAIL
+
+  [Property z-index value 'min(1.1, max(0.4, 0.6))']
+    expected: FAIL
+
+  [Property z-index value 'min(1)']
+    expected: FAIL
+
+  [Property z-index value 'calc(max(0.3, 0.6) / 2)']
+    expected: FAIL
+
+  [Property z-index value 'min(0.4)']
+    expected: FAIL
+
+  [Property z-index value 'max(1)']
+    expected: FAIL
+
+  [Property z-index value 'max(0.6)']
+    expected: FAIL
+
+  [Property z-index value 'calc(min(0.3, 0.6) * 2)']
+    expected: FAIL
+
+  [Property z-index value 'max(0.3, min(1.1, 0.4))']
+    expected: FAIL
+
+  [Property z-index value 'min(0.6)']
+    expected: FAIL
+