* 6.4:
  Fix php.net links
  [DoctrineBridge] Restore compatibility with Doctrine ODM by validating $class object type
  [FrameworkBundle] Add functional tests for the `ContainerLintCommand` command
  Fix precision loss when rounding large integers in `NumberToLocalizedStringTransformer`

…ncorrect scope (santysisi)

This PR was merged into the 6.4 branch.

Discussion
----------

[Serializer] Fix `readonly` property initialization from incorrect scope

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | Fix #60846
| License       | MIT

Readonly properties couldn't be initialized during denormalization due to scope restrictions. This change checks if a property is `readonly` and uninitialized, if so, it sets the value using the declaring class's scope.

Also added a safety check to throw a `LogicException` if a `readonly` property is already initialized, to avoid accidental mutation.

Commits
-------

79c2ea6 [Serializer] Fix readonly property initialization from incorrect scope

* 6.4:
  Fix typo
  [VarExporter] Dump implicit-nullable types as explicit to prevent the corresponding deprecation
  [Serializer] Fix readonly property initialization from incorrect scope
  Update BrevoRequestParser.php

* 6.4:
  -
  CS fixes

…rvinSzanto)

This PR was squashed before being merged into the 7.2 branch.

Discussion
----------

[Serializer] Handle invalid mapping type property type

| Q             | A
| ------------- | ---
| Branch?       | 7.2
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        |
| License       | MIT

When using `#[MapRequestPayload]` along with a type that uses a `#[DescriminatorMap]` it's possible for a user to craft a payload that triggers a `TypeError` by passing the wrong type for the "type" property.

For example, a class that has:
```php
#[DiscriminatorMap('field', ['a' => AController::class, 'b' => BController::class])]
```
and a request comes in with:
```
Content-Type: application/json

{"field":{}}
```

will trigger a 500 because `AbstractObjectNormalizer` doesn't validate the field type before passing it to `->getClassForType` which typehints for string.

This PR adds a conditional that filters anything other than strings or objects that have a __toString method.

Commits
-------

6ab0182 [Serializer] Handle invalid mapping type property type