Auto merge of #29916 - mrobinson:rename-meta-directories, r=atbrakhi

Rename metadata directories

Rename metadata directories and update all references. This is in preparation
for making Layout 2020 the default layout system.

This does the following 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`

---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because they change how tests are run.

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1 files changed, 2 insertions, 0 deletions

diff --git a/tests/wpt/meta-legacy-layout/html/semantics/scripting-1/the-script-element/css-module/import-css-module-dynamic.html.ini b/tests/wpt/meta-legacy-layout/html/semantics/scripting-1/the-script-element/css-module/import-css-module-dynamic.html.ini
new file mode 100644
index 00000000000..e2611f01222
--- /dev/null
+++ b/tests/wpt/meta-legacy-layout/html/semantics/scripting-1/the-script-element/css-module/import-css-module-dynamic.html.ini
@@ -0,0 +1,2 @@
+[import-css-module-dynamic.html]
+  expected: ERROR