[GHA] Test on PHP 8.2 as experimental and 8.1 as a regular version

Author: nicolas-grekas

Tests/DateFormatter/AbstractIntlDateFormatterTest.php

@@ -56,13 +56,19 @@ public function testConstructorDefaultTimeZone()
         );
     }
 
+    /**
+     * @group legacy
+     */
     public function testConstructorWithoutDateType()
     {
         $formatter = $this->getDateFormatter('en', null, IntlDateFormatter::SHORT, 'UTC', IntlDateFormatter::GREGORIAN);
 
         $this->assertSame('EEEE, MMMM d, y \'at\' h:mm a', $formatter->getPattern());
     }
 
+    /**
+     * @group legacy
+     */
     public function testConstructorWithoutTimeType()
     {
         $formatter = $this->getDateFormatter('en', IntlDateFormatter::SHORT, null, 'UTC', IntlDateFormatter::GREGORIAN);