Fix compilation of TestPluginMeta

Needed to implement isFoliaSupported()

patches/server/0014-Require-plugins-to-be-explicitly-marked-as-Folia-sup.patch

@@ -62,3 +62,21 @@ index 14ed05945ba5bfeb2b539d4786278b0e04130404..ad13d60eeb94a75c97b3d0696c39d834
          // Copied from SimplePluginManager#loadPlugins
          // Spigot doesn't validate the name when the config is created, and instead when the plugin is loaded.
          // Paper plugin configuration will do these checks in config serializer instead of when this is created.
+diff --git a/src/test/java/io/papermc/paper/plugin/TestPluginMeta.java b/src/test/java/io/papermc/paper/plugin/TestPluginMeta.java
+index ba271c35eb2804f94cfc893bf94affb9ae13d3ba..db9285c2ff0c805f5d9564b6e8520c33ea5bb65a 100644
+--- a/src/test/java/io/papermc/paper/plugin/TestPluginMeta.java
++++ b/src/test/java/io/papermc/paper/plugin/TestPluginMeta.java
+@@ -20,6 +20,13 @@ public class TestPluginMeta implements PluginMeta {
+         this.identifier = identifier;
+     }
+ 
++    // Folia start - region threading
++    @Override
++    public boolean isFoliaSupported() {
++        return true;
++    }
++    // Folia end - region threading
++
+     @Override
+     public @NotNull String getName() {
+         return this.identifier;