This PR was squashed before being merged into the 4.3-dev branch (closes#30549).Discussion----------[HttpClient] Make exceptions public| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | no<!-- don't forget to update src/**/CHANGELOG.md files -->| BC breaks?    | no     <!-- seehttps://symfony.com/bc -->| Deprecations? | no <!-- don't forget to update UPGRADE-*.md and src/**/CHANGELOG.md files -->| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->| Fixed tickets | #...   <!-- #-prefixed issue number(s), if any -->| License       | MIT| Doc PR        | n/aMakes it easier to implement the interface. Seeapi-platform/core#2608Commits-------928d774 [HttpClient] Make exceptions public

This PR was merged into the 5.1-dev branch.Discussion----------[HttpClient] add TimeoutExceptionInterface| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | yes| New feature?  | yes| Deprecations? | no| Tickets       | -| License       | MIT| Doc PR        | -This is fixing a design issue: unlike any other `TransportExceptionInterface`, timeouts are not fatal transport errors. For this reason, we must allow one to identify them.~This PR also marks exception classes as `@internal`, to encourage ppl to catch them using their interface and not their class name.~ this would revert#30549Commits-------ab8eca0 [HttpClient] add TimeoutExceptionInterface