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/html/semantics/scripting-1/the-script-element/import-assertions/dynamic-import-with-assertion-argument.any.js.ini

@@ -0,0 +1,8 @@
+[dynamic-import-with-assertion-argument.any.worker.html]
+  expected: ERROR
+
+[dynamic-import-with-assertion-argument.any.sharedworker.html]
+  expected: ERROR
+
+[dynamic-import-with-assertion-argument.any.html]
+  expected: ERROR

tests/wpt/meta/html/semantics/scripting-1/the-script-element/import-assertions/dynamic-import-with-assertion-argument.html.ini

@@ -0,0 +1,2 @@
+[dynamic-import-with-assertion-argument.html]
+  expected: ERROR

tests/wpt/meta/html/semantics/scripting-1/the-script-element/import-assertions/empty-assertion-clause.html.ini

@@ -0,0 +1,5 @@
+[empty-assertion-clause.html]
+  expected: ERROR
+  [Test that no error occurs when an empty import assertion clause is provided.]
+    expected: FAIL
+

tests/wpt/meta/html/semantics/scripting-1/the-script-element/import-assertions/invalid-type-assertion-error.html.ini

@@ -0,0 +1,4 @@
+[invalid-type-assertion-error.html]
+  [Test that invalid module type assertion leads to TypeError on window.]
+    expected: FAIL
+

tests/wpt/meta/html/semantics/scripting-1/the-script-element/import-assertions/unsupported-assertion.html.ini

@@ -0,0 +1,5 @@
+[unsupported-assertion.html]
+  expected: ERROR
+  [Test that no error occurs when an unsupported import assertion is provided.]
+    expected: FAIL
+