minor symfony#52992 [Serializer] Make sure Serializer::denormalize() shows what exception it throws (Nyholm)

This PR was merged into the 5.4 branch.

Discussion
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[Serializer] Make sure Serializer::denormalize() shows what exception it throws

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | no
| License       | MIT

This was missing from symfony#42502. We have no contract that explains that this exceptions should be thrown.

With this addition, we technically make this a "sometimes" feature of the Serializer class.

Commits
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bca846b Make sure Serializer::denormalize have show what exception it throws

Author: fabpot

src/Symfony/Component/Serializer/Serializer.php

@@ -197,6 +197,7 @@ public function normalize($data, string $format = null, array $context = [])
      * {@inheritdoc}
      *
      * @throws NotNormalizableValueException
+     * @throws PartialDenormalizationException Occurs when one or more properties of $type fails to denormalize
      */
     public function denormalize($data, string $type, string $format = null, array $context = [])
     {