[Symfony 6] The constant Symfony\Component\Routing\RouteCompiler::REGEX_DELIMITER is deprecated.

Problem/Motivation

In Symfony 5.1 is the constant Symfony\Component\Routing\RouteCompiler::REGEX_DELIMITER is deprecated. For more info see: https://github.com/symfony/symfony/blob/4537f85963fba75f9ec2aa9a39c04814... and https://github.com/symfony/symfony/blob/5.x/src/Symfony/Component/Routin...

Proposed resolution

Replace the usage of the constant.

Remaining tasks

TBD

User interface changes

None

API changes

Data model changes

None

Release notes snippet

TBD