Merge branch '7.4' into 8.0

* 7.4: (21 commits)
  [SecurityBundle] Fix tests with Symfony 7.4
  [DependencyInjection] Ensure deprecation detection does not trigger a PHP error
  [DependencyInjection][FrameworkBundle] fix BC break when dumping container for build/lint commands
  [Form] Clean up wrong method docblocks in data transformers
  Fix merge
  [DependencyInjection] Throw when using `$this` or its internal scope from PHP config files; use the `$loader` variable instead
  [HttpClient] Fix sharing CurlClientState between clones of CurlHttpClient instances
  [FrameworkBundle] Don't exclude classes with constraint/serialization attributes from being registered as services
  Revert "[HttpClient] Lazily initialize CurlClientState"
  [Yaml] Fix regression handling blank lines in unquoted scalars
  [Cache] Fix NullAdapter must set taggable
  [FrameworkBundle] Order alphabetically known tags of `UnusedTagsPass`
  allow the installation of MercureBundle 0.4
  [Console] don't discard existing aliases when constructing Command
  Import all node definition classes to DefinitionConfigurator
  Fix the creation of a redis connection with only ext-relay
  [FrameworkBundle] Dump bundles config reference first
  [DependencyInjection] Don't add the .container.known_envs parameter when empty
  [DependencyInjection] Reset resolved state when setting a parameter
  [HttpKernel] Don't reset services between fragments redering when using in HttpCache
  ...

Author: nicolas-grekas

Request.php

@@ -837,7 +837,7 @@ public function getScriptName(): string
      *
      * Suppose this request is instantiated from /mysite on localhost:
      *
-     *  * http://localhost/mysite              returns an empty string
+     *  * http://localhost/mysite              returns '/'
      *  * http://localhost/mysite/about        returns '/about'
      *  * http://localhost/mysite/enco%20ded   returns '/enco%20ded'
      *  * http://localhost/mysite/about?var=1  returns '/about'