[kemono] update extractor to use new domains (#7902 #7907 #7904)

* Update kemono.py
* Update coomer.py
* Update kemono.py
* Fixed TypeError
    - Fixed a regex mistake I made
* Make legacy domains resolve as current domains
* Update gallery_dl/extractor/kemono.py
* remove legacy .su domain support
* fixed accidental regex change
* update docs/supportedsites
* update test results
    - (re)add legacy domain URLs
    - update URL pattern TLDs
* restore support for '.su' TLDs

---------

Co-authored-by: Mike Fährmann <mike_faehrmann@web.de>

docs/supportedsites.md

@@ -201,7 +201,7 @@ Consider all listed sites to potentially be NSFW.
 </tr>
 <tr>
     <td>Coomer</td>
-    <td>https://coomer.su/</td>
+    <td>https://coomer.st/</td>
     <td>Artists, Favorites, Posts, User Profiles</td>
     <td>Supported</td>
 </tr>
@@ -537,7 +537,7 @@ Consider all listed sites to potentially be NSFW.
 </tr>
 <tr>
     <td>Kemono</td>
-    <td>https://kemono.su/</td>
+    <td>https://kemono.cr/</td>
     <td>Artists, Discord Servers, Favorites, Posts, User Profiles</td>
     <td>Supported</td>
 </tr>