layout: Stretch <input> inner container to its containing block (#38775)

The `<input>` element inner container should be stretch to its
containing block. This would allow the alignment of the text. This is
done by adding `min-width: 100%`. It is required because we are not
using a custom layout contrary to Firefox and Chrome.

Testing: New Servo specific WPT.

---------

Signed-off-by: Jo Steven Novaryo <jo.steven.novaryo@huawei.com>

tests/wpt/mozilla/meta/MANIFEST.json

@@ -169,6 +169,19 @@
       ],
       {}
      ]
+    ],
+    "input-textual-text-align.html": [
+     "600a41cba133e9933132165e7cc4a2ea0ca28884",
+     [
+      "appearance/input-textual-text-align.html",
+      [
+       [
+        "/_mozilla/appearance/input-textual-text-align-ref.html",
+        "=="
+       ]
+      ],
+      {}
+     ]
     ]
    },
    "css": {
@@ -8154,6 +8167,10 @@
      "d30f13a2a1bab16989ec585a57ba7b7bd0b1c329",
      []
     ],
+    "input-textual-text-align-ref.html": [
+     "c2c99bc0751afd0aea3479a54df5f1d107fff38d",
+     []
+    ],
     "supports": {
      "input-textual-ref.css": [
       "7cdabb05d5dd7eb39df521fcb5ce24e39fea840f",