Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `.github/workflows/build-image.yml`:
  Upstream changed how docker images were built, including how
  they were cached.
  I don't know much about it, so applied upstream's changes.
- `app/controllers/admin/domain_blocks_controller.rb`:
  The feature, that was in glitch-soc, got backported upstream.
  It also had a few fixes upstream, so those have been ported!
- `app/javascript/packs/admin.js`:
  Glitch-soc changes have been backported upstream. As a result,
  some code from `app/javascript/core/admin.js` got added upstream.
  Kept our version since our shared Javascript already has that feature.
- `app/models/user.rb`:
  Upstream added something to distinguish unusable and unusable-because-moved
  accounts, while glitch-soc considers moved accounts usable.
  Took upstream's code for `functional_or_moved?` and made `functional?`
  call it.
- `app/views/statuses/_simple_status.html.haml`:
  Upstream cleaned up code style a bit, on a line that we had custom changes
  for.
  Applied upstream's change while keeping our change.
- `config/initializers/content_security_policy.rb`:
  Upstream adopted one CSP directive we already had.
  The conflict is because of our files being structurally different, but the
  change itself was already part of glitch-soc.
  Kept our version.

app/views/statuses/_detailed_status.html.haml

@@ -15,12 +15,12 @@
 
   = account_action_button(status.account)
 
-  .status__content.emojify{ :data => ({ spoiler: current_account&.user&.setting_expand_spoilers ? 'expanded' : 'folded' } if status.spoiler_text?) }<
+  .status__content.emojify{ data: ({ spoiler: current_account&.user&.setting_expand_spoilers ? 'expanded' : 'folded' } if status.spoiler_text?) }<
     - if status.spoiler_text?
       %p<
         %span.p-summary> #{prerender_custom_emojis(h(status.spoiler_text), status.emojis)}&nbsp;
         %button.status__content__spoiler-link= t('statuses.show_more')
-    .e-content{ :lang => status.language }
+    .e-content{ lang: status.language }
       = prerender_custom_emojis(status_content_format(status), status.emojis)
 
       - if status.preloadable_poll

app/views/statuses/_simple_status.html.haml

@@ -27,12 +27,12 @@
           %span.display-name__account
             = acct(status.account)
             = fa_icon('lock') if status.account.locked?
-  .status__content.emojify{ :data => ({ spoiler: current_account&.user&.setting_expand_spoilers ? 'expanded' : 'folded' } if status.spoiler_text?) }<
+  .status__content.emojify{ data: ({ spoiler: current_account&.user&.setting_expand_spoilers ? 'expanded' : 'folded' } if status.spoiler_text?) }<
     - if status.spoiler_text?
       %p<
         %span.p-summary> #{prerender_custom_emojis(h(status.spoiler_text), status.emojis)}&nbsp;
         %button.status__content__spoiler-link= t('statuses.show_more')
-    .e-content{ :lang => status.language }<
+    .e-content{ lang: status.language }<
       = prerender_custom_emojis(status_content_format(status), status.emojis)
 
       - if status.preloadable_poll