bug #41512 Relax requirement on symfony/runtime (lyrixx)
bug #41512 Relax requirement on symfony/runtime (lyrixx)

This PR was merged into the 5.3 branch.

Discussion
----------

Relax requirement on symfony/runtime

| Q             | A
| ------------- | ---
| Branch?       | 5.3
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |

It looks like we have an issue with runtime:

```
rio ~/rio/server/backend composer out
[...]
symfony/symfony           v5.3.0  v5.3.1 The Symfony PHP framework
```

```
rio ~/rio/server/backend composer why-not symfony/symfony:v5.3.1
symfony/symfony         v5.3.1      requires          symfony/runtime (self.version)
jolicode/redirectionio  dev-master  does not require  symfony/runtime (but v5.3.0 is installed)
```

So symfony/symfony require symfony/runtime with "self.version"
But symfony/runtime 5.3.1 does not exist

=> so symfony/symfony 5.3.1 is not installable

Commits
-------

7d821f112a Move symfony/runtime from require to require-dev in main composer.json

stof/symfony,paradajozsef/symfony,d-ph/symfony,paradajozsef/symfony,derrabus/symfony,ro0NL/symfony,curry684/symfony,HeahDude/symfony,HeahDude/symfony,derrabus/symfony,damienalexandre/symfony,ogizanagi/symfony,mpdude/symfony,damienalexandre/symfony,curry684/symfony,derrabus/symfony,Tobion/symfony,xabbuh/symfony,phramz/symfony,sgehrig/symfony,sgehrig/symfony,damienalexandre/symfony,tucksaun/symfony,ro0NL/symfony,nicolas-grekas/symfony,derrabus/symfony,ogizanagi/symfony,hhamon/symfony,oleg-andreyev/symfony,Tobion/symfony,nicolas-grekas/symfony,Tobion/symfony,symfony/symfony,paradajozsef/symfony,d-ph/symfony,ogizanagi/symfony,sgehrig/symfony,curry684/symfony,d-ph/symfony,mpdude/symfony,damienalexandre/symfony,HeahDude/symfony,xabbuh/symfony,ro0NL/symfony,oleg-andreyev/symfony,oleg-andreyev/symfony,mpdude/symfony,phramz/symfony,stof/symfony,symfony/symfony,HeahDude/symfony,tucksaun/symfony,xabbuh/symfony,symfony/symfony,d-ph/symfony,hhamon/symfony,xabbuh/symfony,stof/symfony,symfony/symfony,phramz/symfony,hhamon/symfony,ogizanagi/symfony,curry684/symfony,mpdude/symfony,tucksaun/symfony,hhamon/symfony,nicolas-grekas/symfony,Tobion/symfony,tucksaun/symfony,nicolas-grekas/symfony,paradajozsef/symfony,sgehrig/symfony,phramz/symfony,ro0NL/symfony,oleg-andreyev/symfony,stof/symfony