This PR was merged into the 4.4 branch.

Discussion
----------

[Translation] Fix FileDumper behavior

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix #34713
| License       | MIT
| Doc PR        | -

Execute `bin/console translation:update --force en` command:

## Before
See related issue for details #34713

## After
The default translation file name will depend on whether the intl (or polyfill) extension is installed or not.

For exmaple:

| Intl extension (or polyfill) installed | translation file created |
| --- | --- |
| no | messages.en.xlf |
| yes | messages+intl-icu.en.xlf |

However, if you are currently updating a single file, that file name will be used regardless of whether the Intl extension is installed, i.e. if you have this translation file: `messages.en.xlf`, new translation keys will be stored in it, even if you have installed the intl extension.

Last, if both translation files (`messages.es.xlf` and `messages+intl-icu.en.xlf`) coexist in the same path, rare but possible, we will use the default filename guessed earlier to store all current messages and the another file will be emptied.

Commits
-------

1c41ae7 Fixed translations file dumper behavior

…fix #34713 (yceruto)

This PR was squashed before being merged into the 4.4 branch.

Discussion
----------

Revert #34797 "Fixed translations file dumper behavior" and fix #34713

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix #35264
| License       | MIT
| Doc PR        | -

Revert #34797

See also #35328

It's very likely that the new way will be completely different from this one that is being reverted. That's why I'm reverting rather than fixing it.

Commits
-------

9ca8720 Fixed #34713 Move new messages to intl domain when possible
56e79fe Revert "Fixed translations file dumper behavior"

* 4.4:
  [DI] Fix EnvVar not loaded when Loader requires an env var
  Fixed #34713 Move new messages to intl domain when possible
  [FrameworkBundle] Fix small typo in output comment
  chown and chgrp should also accept int as owner and group
  Revert "Fixed translations file dumper behavior"
  Fix RememberMe with null password
  [Validator] Fix plurals for sr_Latn (Serbian language written in latin script) validation messages
  Set booted flag to false when test kernel is unset
  [FrameworkBundle] remove messenger cache if not enabled
  [PhpUnitBridge][SymfonyTestsListenerTrait] Remove some unneeded code
  [HttpClient] Fix strict parsing of response status codes
  fix PHP const mapping keys using the inline notation
  [SecurityBundle] Drop duplicated code
  [FrameworkBundle] Make sure one can use fragments.hinclude_default_template
  Fix that no-cache requires positive validation with the origin, even for fresh responses
  Improve upgrading instructions for deprecated router options
  [DI] Suggest typed argument when binding fails with untyped argument

* 5.0:
  [Filesystem] chown and chgrp should also accept int as owner and group
  [DI] Fix EnvVar not loaded when Loader requires an env var
  Fixed #34713 Move new messages to intl domain when possible
  [FrameworkBundle] Fix small typo in output comment
  chown and chgrp should also accept int as owner and group
  Revert "Fixed translations file dumper behavior"
  Fix RememberMe with null password
  [Validator] Fix plurals for sr_Latn (Serbian language written in latin script) validation messages
  Set booted flag to false when test kernel is unset
  [FrameworkBundle] remove messenger cache if not enabled
  [PhpUnitBridge][SymfonyTestsListenerTrait] Remove some unneeded code
  [HttpClient] Fix strict parsing of response status codes
  fix PHP const mapping keys using the inline notation
  [SecurityBundle] Drop duplicated code
  [FrameworkBundle] Make sure one can use fragments.hinclude_default_template
  Fix that no-cache requires positive validation with the origin, even for fresh responses
  Improve upgrading instructions for deprecated router options
  [DI] Suggest typed argument when binding fails with untyped argument