This PR was squashed before being merged into the 4.4 branch.Discussion----------[FrameworkBundle] Dont store cache misses on warmup| Q             | A| ------------- | ---| Branch?       | 4.4| Bug fix?      | yes| New feature?  | no| Deprecations? | no| Tickets       |Fix#38694| License       | MIT| Doc PR        |symfony/symfony-docs#15172When we are warming the annotation cache, we are reading all annotation into an `ArrayAdapter`. When we are done we move the values to a `PhpArrayAdapter` to store them in a file.@Seldaek [found out](#38694 (comment)) that when you are using a custom constraint with a `Symfony\Component\Validator\Constraints\Callback`, there is a strange error like:> Can use "yield from" only with arrays and TraversablesThat is because the `Closure` in the `Symfony\Component\Validator\Constraints\Callback` cannot be serialised and saved to cache. But since the `ArrayAdapter` is also [storing misses as null](#35362), the null values are understood as real values.When all values are moved to the `PhpArrayAdapter` and we ask the cache for a value (via Doctrine's `CacheProvider`), it will return `null` as a value instead of `false` as a cache miss. And `null` is not something one could "yield from".Commits-------27a22b3 [FrameworkBundle] Dont store cache misses on warmup

This PR was squashed before being merged into the 4.4 branch.Discussion----------[FrameworkBundle] Dont store cache misses on warmup| Q             | A| ------------- | ---| Branch?       | 4.4| Bug fix?      | yes| New feature?  | no| Deprecations? | no| Tickets       | Fix #38694| License       | MIT| Doc PR        |symfony/symfony-docs#15172When we are warming the annotation cache, we are reading all annotation into an `ArrayAdapter`. When we are done we move the values to a `PhpArrayAdapter` to store them in a file.@Seldaek [found out](symfony/symfony#38694 (comment)) that when you are using a custom constraint with a `Symfony\Component\Validator\Constraints\Callback`, there is a strange error like:> Can use "yield from" only with arrays and TraversablesThat is because the `Closure` in the `Symfony\Component\Validator\Constraints\Callback` cannot be serialised and saved to cache. But since the `ArrayAdapter` is also [storing misses as null](symfony/symfony#35362), the null values are understood as real values.When all values are moved to the `PhpArrayAdapter` and we ask the cache for a value (via Doctrine's `CacheProvider`), it will return `null` as a value instead of `false` as a cache miss. And `null` is not something one could "yield from".Commits-------27a22b34af [FrameworkBundle] Dont store cache misses on warmup