style: Implement parsing / serialization for container{,-type,-name} CSS properties

Two noteworthy details that may seem random otherwise:

 * Moving values around in nsStyleDisplay is needed so that the struct
   remains under the size limit that we have to avoid jumping allocator
   buckets.

 * All the test expectation churn is because tests depend on
   `container-type: size` parsing to run, and now they run. Tests for
   the relevant bits I implemented are passing, with the only exception
   of some `container-name-computed.html` failures which are
   https://github.com/w3c/csswg-drafts/issues/7181. Safari agrees with
   us there.

Other notes when looking at the spec and seeing how it matches the
implementation:

 * `container` syntax doesn't match spec, but matches tests and sanity:
   https://github.com/w3c/csswg-drafts/issues/7180

 * `container-type` syntax doesn't _quite_ match spec, but matches tests
   and I think it's a spec bug since the definition for the missing
   keyword is gone:
   https://github.com/w3c/csswg-drafts/issues/7179

Differential Revision: https://phabricator.services.mozilla.com/D142419

components/style/properties/longhands/box.mako.rs

@@ -623,6 +623,26 @@ ${helpers.predefined_type(
     animation_value_type="none",
 )}
 
+${helpers.predefined_type(
+    "container-type",
+    "ContainerType",
+    "computed::ContainerType::NONE",
+    engines="gecko",
+    animation_value_type="none",
+    gecko_pref="layout.css.container-queries.enabled",
+    spec="https://drafts.csswg.org/css-contain-3/#container-type",
+)}
+
+${helpers.predefined_type(
+    "container-name",
+    "ContainerName",
+    "computed::ContainerName::none()",
+    engines="gecko",
+    animation_value_type="none",
+    gecko_pref="layout.css.container-queries.enabled",
+    spec="https://drafts.csswg.org/css-contain-3/#container-name",
+)}
+
 ${helpers.predefined_type(
     "appearance",
     "Appearance",