Allow to use symfony/expression in security attributes

[goetas]

Subject

Allow to use symfony expressions in security attributes.

As of symfony 4.4 (https://symfony.com/doc/4.4/security/expressions.html) it is possible to use expressions (not only strings) for attributes.

I am targeting this branch, because i think that is a small bc break but if you think that it needs to go into 5.x i can rebase it.

I did not add tests or documentation because I want to see if there is interest in this PR, if yes i will provide tests and documentation.

Changelog

### Changed
- Security attributes can be string or symfony expression language expressions

To do

• [ ] Update the tests;
• [ ] Update the documentation;
• [ ] Add an upgrade note.

[goetas]

that is great to hear, i will update/rebase the PR soon

[VincentLanglet]

I plan to release 4.16 soon. If you have time to update your PR to be on it ;)

[goetas]

im sorry if i did not manage to finalize this PR. :(

thanks for the great work with sonata!!

[VincentLanglet]

im sorry if i did not manage to finalize this PR. :(

thanks for the great work with sonata!!

No problem.

You had Update the documentation; in your todo but I didn't find doc to update. If you want to add some, you're welcome.