Allow preventing BlockDestroyEvent from dropping items (#8349)

patches/api/BlockDestroyEvent.patch

@@ -41,7 +41,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    private static final HandlerList handlers = new HandlerList();
 +
 +    @NotNull private final BlockData newState;
-+    private final boolean willDrop;
++    private boolean willDrop;
 +    private boolean playEffect = true;
 +
 +    private boolean cancelled = false;
@@ -68,6 +68,13 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    }
 +
 +    /**
++     * @param willDrop If the server is going to drop the block in question with this destroy event
++     */
++    public void setWillDrop(boolean willDrop) {
++        this.willDrop = willDrop;
++    }
++
++    /**
 +     * @return If the server is going to play the sound effect for this destruction
 +     */
 +    public boolean playEffect() {

patches/server/BlockDestroyEvent.patch

@@ -36,6 +36,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                    return false;
 +                }
 +                playEffect = event.playEffect();
++                drop = event.willDrop();
 +            }
 +            // Paper end