Bug 1989469 [wpt PR 54940] - Stop making appearance:base-select submit form on enter, a=testonly

Automatic update from web-platform-tests
Stop making appearance:base-select submit form on enter

When customizable select was going to be a new element, we decided on
the enter form submission behavior here:
openui/open-ui#386

It got negative feedback in the attached bug since customizable select
now reuses the select element, so this patch reverts the behavior and
makes it do the same thing as appearance:auto select.

Fixed: 429647164
Change-Id: Ia40a309270d8f34123c5f697f583ae982eebd24d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6959790
Commit-Queue: Joey Arhar <jarharchromium.org>
Reviewed-by: Mason Freed <masonfchromium.org>
Cr-Commit-Position: refs/heads/main{#1520122}

--

wpt-commits: d2237d464332c35f78afb7f178e3dd44732cdbf1
wpt-pr: 54940

UltraBlame original commit: 7e1d2b74902a980ac83d9c18ee6016f159319c04

Author: marco-c

testing/web-platform/tests/html/semantics/forms/the-select-element/customizable-select/select-keyboard-behavior.optional.html

@@ -1168,7 +1168,7 @@
 requestAnimationFrame
 )
 ;
-assert_true
+assert_false
 (
 formWasSubmitted
 '