Switch out Cloudflare zlib for libdeflate.

libdeflate is significantly faster than vanilla zlib, zlib-ng, and Cloudflare zlib. It is also MIT-licensed (so no licensing concerns). In addition, it simplifies a lot of the native code (something that's been tricky to get right).

While we're at it, I have also taken the time to fine-time compression in Velocity in general. Thanks to this work, native compression only requires one JNI call, an improvement from the more than 2 (sometimes up to 5) that were possible before. This optimization also extends to the existing Java compressors, though they require potentially two JNI calls.

native/src/test/java/com/velocitypowered/natives/compression/VelocityCompressorTest.java

@@ -86,10 +86,11 @@ class VelocityCompressorTest {
     ByteBuf decompressed = bufSupplier.get();
 
     source.writeBytes(TEST_DATA);
+    int uncompressedData = source.readableBytes();
 
     try {
       compressor.deflate(source, dest);
-      compressor.inflate(dest, decompressed, Integer.MAX_VALUE);
+      compressor.inflate(dest, decompressed, uncompressedData);
       source.readerIndex(0);
       assertTrue(ByteBufUtil.equals(source, decompressed));
     } finally {