…izer` during denormalization (frankdekker)This PR was squashed before being merged into the 7.4 branch.Discussion----------[Serializer] Allow forcing timezone in `DateTimeNormalizer` during denormalization| Q             | A| ------------- | ---| Branch?       | 7.4| Bug fix?      | no| New feature?  | yes| Deprecations? | no| Issues        |Fix#59807| License       | MITBy default the `DateTimeNormalizer` will denormalize timestamps and date strings that include a timezone to `DateTime` objects with respective timezone UTC or the timezone from the date string. Even with the context key `TIMEZONE_KEY` set, the timezone from the input superceeds the context timezone.This PR allows to set `PRESERVE_CONTEXT_TIMEZONE_KEY` context to `true` (default: `false`), which in combination with `TIMEZONE_KEY` will set the Timezone of the denormalized DateTimes to the given timezone. The timezone from the input will be overwritten.### Documentationsymfony/symfony-docs#20860Commits-------bd1a4d0 [Serializer] Allow forcing timezone in `DateTimeNormalizer` during denormalization