…nhndrcksn)

This PR was merged into the 7.1 branch.

Discussion
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[Serializer] fix denormalizing mixed collection values

| Q             | A
| ------------- | ---
| Branch?       | 7.1
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | Fix #57914
| License       | MIT

Commits
-------

f42ff39 fix denormalizing mixed collection values

* 6.4:
  [Serializer] Remove redundant @internal tags from traceable classes
  Fix conversion of partitioned cookies in the PSR-7 bridge
  [Validator] added Polish translation for units 116-119
  Revert stateless check
  [Console] Fix side-effects from running bash completions
  skip transient Redis integration tests on AppVeyor

* 5.4:
  remove custom CSV escape character from tests
  fix compatibility with Twig 3.12 and 4.0

* 6.4:
  remove custom CSV escape character from tests
  [HttpKernel] ESI fragment content may be missing in conditional requests
  [SecurityBundle] Revert adding `_stateless` attribute to the request when firewall is stateless and the attribute is not already set
  fix compatibility with Twig 3.12 and 4.0
  Improve and add tests for Last-Modified computation with ESI responses

* 6.4:
  fix tests
  [DependencyInjection] Add tests for repeating `#[Autoconfigure]` attributes
  [DependencyInjection] Fix handling of repeated `#[Autoconfigure]` attributes
  [SecurityBundle] Make security schema deterministic
  [Translations][Core] Fix security Italian translation.
  clean up PHP version checks
  Support the `unique_proxy_open` event

…zeWithContext