[Reference] link translation DIC tags to components section

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | 

The `translation.loader` and `translation.dumper` DIC tags link to the respective sections in the Translation component documentation (in addition to the changes done in #4166).
Hm, don't you think it's clear enough with link directly pointing to the relevant part? Do you think that "[...] in the component's documentation" is better?