feature #59254 [JsonEncoder] Remove chunk size definition (mtarld)

This PR was merged into the 7.3 branch.

Discussion
----------

[JsonEncoder] Remove chunk size definition

| Q             | A
| ------------- | ---
| Branch?       | 7.3
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Issues        |
| License       | MIT

Remove the `$forceEncodeChunks` boolean.

This boolean was telling if the encoder should use `json_encode` or should yield as small strings as possible.
It was set to `false` by default and not easily configurable yet.

This configurable behavior has been removed.
Instead, we use `json_encode` directly if **the value that does not contain any object**. Otherwise, it'll be split (see the diff in `src/Symfony/Component/JsonEncoder/Tests/Fixtures/encoder/object_in_object.php`)

IMHO, this will fit most of the use cases, and remove a configuration complicated to understand.

Commits
-------

86274994ff [JsonEncoder] Remove chunk size definition

Resources/config/json_encoder.php

@@ -32,7 +32,6 @@
                 tagged_locator('json_encoder.normalizer'),
                 service('json_encoder.encode.property_metadata_loader'),
                 param('.json_encoder.encoders_dir'),
-                false,
             ])
         ->set('json_encoder.decoder', JsonDecoder::class)
             ->args([
@@ -113,7 +112,6 @@
                 service('json_encoder.decode.property_metadata_loader'),
                 param('.json_encoder.encoders_dir'),
                 param('.json_encoder.decoders_dir'),
-                false,
                 service('logger')->ignoreOnInvalid(),
             ])
             ->tag('kernel.cache_warmer')