…`Yaml::DUMP_NULL_AS_EMPTY` flag

…e by using the `Yaml::DUMP_NULL_AS_EMPTY` flag (alexandre-daubois)

This PR was merged into the 7.3 branch.

Discussion
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[Yaml] Add support for dumping `null` as an empty value by using the `Yaml::DUMP_NULL_AS_EMPTY` flag

| Q             | A
| ------------- | ---
| Branch?       | 7.2
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Issues        | Fix #58155
| License       | MIT

Another try after #58232. I went for the second solution from `@stof` (symfony/symfony#58232 (comment)), namely dumping empty value as null just in expanded sequences and mappings. When the inline limit of the dumper is reached, it fallbacks on using `null` (examples in tests).

I'm not 100% happy about the name of the constant, `DUMP_NULL_AS_EMPTY_IN_EXPANDED_NOTATION`. It's verbose. I'm open to suggestions!

Commits
-------

1fc1379028 [Yaml] Add support for dumping `null` as an empty value by using the `Yaml::DUMP_NULL_AS_EMPTY` flag

* 7.2: (47 commits)
  Remove comment about AppVeyor in `phpunit`
  [Webhook][RemoteEvent] fix SendgridPayloadConverter category support
  Update old Appveyor skip conditions
  sync the Dutch translation file with changes from the 7.2 branch
  [Yaml] fix inline notation with inline comment
  clean up code for doctrine/persistence 2.x
  Generate missing translations using Gemini
  fix(property-info): make sure that SerializerExtractor returns null for invalid class metadata
  add translations for the Slug constraint
  [RemoteEvent][Webhook] fix SendgridRequestParser & SendgridPayloadConverter in case of missing sg_message_id
  [Messenger] Fix `TransportMessageIdStamp` not always added
  [DoctrineBridge] Fix compatibility to Doctrine persistence 2.5 in Doctrine Bridge 6.4 to avoid Projects stuck on 6.3
  [PropertyInfo] Fix add missing composer conflict
  [ErrorHandler] Don't trigger "internal" deprecations for anonymous LazyClosure instances
  [VarDumper] Fix displaying closure's "this" from anonymous classes
  [Doctrine][Messenger] Prevents multiple TransportMessageIdStamp being stored in envelope
  [HttpKernel] Don't override existing LoggerInterface autowiring alias in LoggerPass
  reject inline notations followed by invalid content
  Fix predis command error checking
  [Security] Fix triggering session tracking from ContextListener
  ...

…sequences

…en dumping sequences (xabbuh)

This PR was squashed before being merged into the 7.3 branch.

Discussion
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[Yaml] Yaml::DUMP_COMPACT_NESTED_MAPPING does not apply when dumping sequences

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

following #59315, the flag should only affect how maps are dumped but shouldn't influence dumping sequences (see also symfony/symfony-docs#20510 (comment))

Commits
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0c124a99e91 [Yaml] Yaml::DUMP_COMPACT_NESTED_MAPPING does not apply when dumping sequences

* 7.2:
  Review validator-related japanese translations with ids 114-120
  don't trigger "internal" deprecations for PHPUnit Stub objects
  drop comments while lexing unquoted strings

…orce double quotes around string values

…ES` flag to enforce double quotes around string values (dkarlovi)

This PR was merged into the 7.3 branch.

Discussion
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[Yaml] Add the `Yaml::DUMP_FORCE_DOUBLE_QUOTES_ON_VALUES` flag to enforce double quotes around string values

| Q             | A
| ------------- | ---
| Branch?       | 7.3
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Issues        | Fix #59680
| License       | MIT

In some scenarios, quoting even safe values is encouraged by various inspectors, for example PHPStorm inspectors will mark it with a warning when used in Kubernetes `ConfigMap` dump.

This option allows forcing the quotes even when technically not required, see #59680 for an example.

Commits
-------

1c06770e099 [Yaml] Add the `Yaml::DUMP_FORCE_DOUBLE_QUOTES_ON_VALUES` flag to enforce double quotes around string values

* 7.2:
  make data provider static