bug #6997 Fix two phpstan findings (VincentLanglet)

This PR was merged into the 4.x branch.

Discussion
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Fix two phpstan findings

Now phpstan is bumped, and I checked error from the level 7 it's easier to find bug/edge cases.
I found two easy "edge cases" to fix.

Commits
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9faa3a0 Fix phpstan findings

Author: javiereguiluz

src/Factory/ActionFactory.php

@@ -184,7 +184,9 @@ private function processActionLabel(ActionDto $actionDto, ?EntityDto $entityDto,
         if ($label instanceof TranslatableInterface) {
             $actionDto->setLabel(TranslatableMessageBuilder::withParameters($label, $translationParameters));
         } else {
-            $translatableActionLabel = (null === $label || '' === $label) ? $label : t($label, $translationParameters, $translationDomain);
+            $translatableActionLabel = (null === $label || '' === $label || false === $label)
+                ? $label
+                : t($label, $translationParameters, $translationDomain);
             $actionDto->setLabel($translatableActionLabel);
         }
     }

src/Intl/IntlFormatter.php

@@ -276,7 +276,7 @@ private function createNumberFormatter(?string $locale, string $style, array $at
     }
 
     /**
-     * @param \DateTimeZone|string|bool|null $timezone $timezone
+     * @param \DateTimeZone|string|bool|null $timezone
      */
     private function convertDate(?\DateTimeInterface $date, $timezone = null): ?\DateTimeInterface
     {
@@ -286,8 +286,10 @@ private function convertDate(?\DateTimeInterface $date, $timezone = null): ?\Dat
 
         if (null === $timezone) {
             $timezone = new \DateTimeZone(date_default_timezone_get());
-        } elseif (!$timezone instanceof \DateTimeZone) {
+        } elseif (\is_string($timezone)) {
             $timezone = new \DateTimeZone($timezone);
+        } elseif (!$timezone instanceof \DateTimeZone) {
+            return $date;
         }
 
         if ($date instanceof \DateTimeImmutable) {

tests/Intl/IntlFormatterTest.php

@@ -170,6 +170,8 @@ public static function provideFormatDateTime()
         yield ['Nov 8, 2020, 3:04:05 AM', new \DateTimeImmutable('2020-11-07 15:04:05', new \DateTimeZone('America/Montevideo')), 'medium', 'medium', '', new \DateTimeZone('Asia/Tokyo'), 'gregorian', 'en'];
 
         yield ['Nov 7, 2020, 2:04:05 PM', new \DateTime('2020-11-07 15:04:05 CET'), 'medium', 'medium', '', null, 'traditional', 'en'];
+
+        yield ['Nov 7, 2020, 2:04:05 PM', new \DateTime('2020-11-07 14:04:05 CET'), 'medium', 'medium', '', false, 'traditional', 'en'];
     }
 
     public static function provideFormatNumber()