[Bundle][FrameworkBundle] make the stopwatch service always available

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11347
| License       | MIT
| Doc PR        | 

Previously, one had to be careful to check if the ``debug.stopwatch`` service was available before using it. Otherwise, the application would break in the prod environment.
That's wrong. In all cases, the `stopwatch` tag must be registered to not break code in the prod env. You should pass the `$this->enabled` value to the constructor of `StopwatchTokenParser` on line 54 instead.