…he locked (mpdude)

This PR was squashed before being merged into the 7.4 branch.

Discussion
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[HttpCache] Add a `waiting` trace when finding the cache locked

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

This adds a new `waiting` trace that will be recorded by the `HttpCache` when the cache had to wait for another, concurrent request to the same resource to finish first.

The information can be used for profiling - a high rate of `waiting` requests means there is a lot of concurrency, so that it might be beneficial to either speed up request processing or consider using `stale-while-revalidate`.

Commits
-------

79d8097f932 [HttpCache] Add a `waiting` trace when finding the cache locked

* 7.3:
  [FrameworkBundle] set NamespacedPoolInterface alias to cache.app
  [Ldap] Fix `LdapUser::isEqualTo`
  Add table of contents in `UPGRADE-7.3.md`
  pass log level instead of exception to resolve the logger
  skip interactive questions asked by Composer
  [SecurityBundle] Remove `AnonymousFactory` leftovers
  [WebProfilerBundle] Fix toolbar with ajax requests not closing
  [HttpKernel] Fix Symfony 7.3 end of maintenance date
  [Translation] Validate of pt_BR translation by a native speaker

* 7.3:
  Fix-type-error-when-revealing-broken-secret
  fix compatibility with Relay 0.11
  [Security] Handle non-callable implementations of `FirewallListenerInterface`
  [DomCrawler] Allow selecting `button`s by their `value`
  flip excluded properties with keys with Doctrine-style constraint config
  [JsonPath] Test against official compliance test suite
  Silence E_DEPRECATED and E_USER_DEPRECATED
  [HttpCache] Hit the backend only once after waiting for the cache lock
  fix compatibility with Symfony 7.4
  [Form] Keep submitted values when keep_as_list option of collection type is enabled
  [Form] Fix `keep_as_list` when data is not an array
  [JsonPath] Fix subexpression evaluation in filters
  [JsonPath] Fix support for comma separated indices

* 7.3:
  -
  [Console] Table counts wrong column width when using colspan and `setColumnMaxWidth()`
  [Console] Table counts wrong number of padding symbols in `renderCell()` method when cell contain unicode variant selector
  [Cache] Fix using a `ChainAdapter` as an adapter for a pool
  [Serializer] Fix collect_denormalization_errors flag in defaultContext
  [TypeInfo] Fix handling `ConstFetchNode`
  [VarDumper] Avoid deprecated call in PgSqlCaster
  Fix command option mode (InputOption::VALUE_REQUIRED)
  use an EOL-agnostic approach to parse class uses
  [Uid] Improve entropy of the increment for UUIDv7
  [HttpKernel] Fix `#[MapUploadedFile]` handling for optional file uploads