Move Log4j plugins to own source set (#9428)

patches/server/Build-system-changes.patch

@@ -48,6 +48,18 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          )
          for (tld in setOf("net", "com", "org")) {
              attributes("$tld/bukkit", "Sealed" to true)
+@@ -0,0 +0,0 @@ tasks.jar {
+     }
+ }
+ 
++tasks.compileJava {
++    // incremental compilation is currently broken due to patched files having compiled counterparts already on the compile classpath
++    options.setIncremental(false)
++}
++
+ publishing {
+     publications.create<MavenPublication>("maven") {
+         artifact(tasks.shadowJar)
 @@ -0,0 +0,0 @@ tasks.shadowJar {
      }
  }