1.21.3 (#2974)

* feat: initial work on 1.21.3 adapter

* chore: method does not exist anymore

* cleanup, deduplicate, drop old versions from runServer task

* chore: apply deduplicated fields changes from PR

* chore: remove jetbrains annotations references

* chore: remove unsupported versions from modrinth release task

* chore: adjust mondrinth versions, update issue template

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -27,7 +27,8 @@ body:
       description: Which server version version you using? If your server version is not listed, it is not supported. Update to a supported version first.
       multiple: false
       options:
-        - '1.21'
+        - '1.21.3'
+        - '1.21.1'
         - '1.20.6'
         - '1.20.4'
         - '1.20.2'