Updated Upstream (Bukkit/CraftBukkit/Spigot) (#8874)

Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
6b3c598b PR-814: Add a method to send multiple equipment changes
181a984b Update Maven shade version to align with CraftBukkit
a5a36e32 Revert "Update Maven shade version to align with CraftBukkit"
7a8f4a42 Update Maven shade version to align with CraftBukkit
58327201 Add support for Java 20

CraftBukkit Changes:
b56426c7a PR-1142: Calculate explosion damage separately for each affected EntityComplexPart
fbe3410af PR-1140: Add a method to send multiple equipment changes
8434e3633 Add support for Java 20
c998a1d23 Increase outdated build delay
4a929b5d6 SPIGOT-7267: Fix EntityType#getTranslationKey() and add unit test
086d8dc8a SPIGOT-7268: CraftMetaPotion reads ShowParticles and ShowIcon properties incorrectly
8ba5e399e SPIGOT-7262: Improve visibility API

Spigot Changes:
a2190e30 Rebuild patches

patches/api/0094-Add-openSign-method-to-HumanEntity.patch

@@ -24,10 +24,10 @@ index abdca9fe5acc90f167219eb769ece66c35682bb1..9715a9d36187e2eecfeab1a05087d27c
      /**
       * Make the entity drop the item in their hand.
 diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
-index c2723b0e34f5d63b4b26ddb3b7c7e8b349a5521e..6a33b5d7fc34a78a131a0ef280cddd1b9718e125 100644
+index ccde3d91163b27e27334d859120e0eb851846d1d..b35d53ef3fd560a4790b5d7850c5d50f7bea2163 100644
 --- a/src/main/java/org/bukkit/entity/Player.java
 +++ b/src/main/java/org/bukkit/entity/Player.java
-@@ -2202,7 +2202,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
+@@ -2210,7 +2210,7 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
      /**
       * Open a Sign for editing by the Player.
       *