minor symfony#53329 [Cache] Fix Couchbase expiration test (alexandre-daubois)

This PR was merged into the 6.3 branch.

Discussion
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[Cache] Fix Couchbase expiration test

| Q             | A
| ------------- | ---
| Branch?       | 6.3
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | -
| License       | MIT

We changed for a datetime instance because older versions of Couchbase supported an expiration time in seconds only if it was < 30 days. But this limit was raised to 50 years, so I suggest we go back to basics and only provide an integer.

Commits
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ee6dd40 [Cache] Fix Couchbase expiration test

Author: xabbuh

src/Symfony/Component/Cache/Adapter/CouchbaseCollectionAdapter.php

@@ -183,7 +183,7 @@ protected function doSave(array $values, $lifetime): array|bool
         }
 
         $upsertOptions = new UpsertOptions();
-        $upsertOptions->expiry(\DateTimeImmutable::createFromFormat('U', time() + $lifetime));
+        $upsertOptions->expiry($lifetime);
 
         $ko = [];
         foreach ($values as $key => $value) {