Remove deprecated Drupal\Core\StringTranslation\TranslationWrapper to TranslatableMarkup in Drupal 11

Can we have an MR here?

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smustgrave → changed the visibility of the branch 11.x to hidden.

Removal of TranslationWrapper seems fine and didn't cause any issues

Changed the title to #32 as seems to more match what's happening here now.

I am not sure that this is a better solution than what we already have. The class alias will be set up on all sites, and we assume that only a very small number of sites actually need this - but we can't get rid of it entirely if it is serialised in unknown places - so isn't it better off left to the autoloader for those sites, but where it won't be loaded at all in the majority case?

Committed 6a9e301 and pushed to 11.x. Thanks!

Automatically closed - issue fixed for 2 weeks with no activity.