convert API/server tests to mockito (#8848)

* convert API tests to mockito

* convert server tests to mockito

* add co-author

patches/server/0079-Sanitise-RegionFileCache-and-make-configurable.patch

@@ -1,25 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Antony Riley <antony@cyberiantiger.org>
-Date: Tue, 29 Mar 2016 08:22:55 +0300
-Subject: [PATCH] Sanitise RegionFileCache and make configurable.
-
-RegionFileCache prior to this patch would close every single open region
-file upon reaching a size of 256.
-This patch modifies that behaviour so it closes the the least recently
-used RegionFile.
-The implementation uses a LinkedHashMap as an LRU cache (modified from HashMap).
-The maximum size of the RegionFileCache is also made configurable.
-
-diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
-index 64e957650dafc9fc30fa997e7f7d3fd47cf60089..1a1ade7538263f4c1a91eb122086a150af3d86ba 100644
---- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
-+++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
-@@ -57,7 +57,7 @@ public class RegionFileStorage implements AutoCloseable {
-             // Paper end
-             return regionfile;
-         } else {
--            if (this.regionCache.size() >= 256) {
-+            if (this.regionCache.size() >= io.papermc.paper.configuration.GlobalConfiguration.get().misc.regionFileCacheSize) { // Paper - configurable
-                 ((RegionFile) this.regionCache.removeLast()).close();
-             }
-