[Java] Upgrade to Agrona 1.21.0. #1001

Job	Run time
C++ Clang 9 (Ubuntu 20.04)	1m 41s
C++ Clang 10 (Ubuntu 20.04)	1m 35s
C++ Clang 11 (Ubuntu 20.04)	2m 28s
C++ Clang 13 (Ubuntu 22.04)	1m 42s
C++ Clang 12 (Ubuntu 20.04)	1m 35s
C++ Xcode (macOS)	1m 41s
C++ Clang 14 (Ubuntu 22.04)	1m 54s
C++ GCC 6 (Ubuntu 20.04)	1m 44s
C++ GCC 7 (Ubuntu 20.04)	1m 27s
C++ Clang 15 (Ubuntu 22.04)	1m 52s
C++ GCC 11 (Ubuntu 22.04)	1m 35s
C++ GCC 8 (Ubuntu 20.04)	1m 51s
C++ Clang 16 (Ubuntu 22.04)	1m 33s
C++ MSVC (Windows) (windows-latest)	5m 10s
C++ GCC 12 (Ubuntu 22.04)	1m 38s
C++ GCC 9 (Ubuntu 20.04)	2m 19s
C++ Clang 17 (Ubuntu 22.04)	1m 29s
C++ GCC 13 (Ubuntu 22.04)	1m 30s
C++ GCC 10 (Ubuntu 20.04)	1m 40s
C# 8.0.x	2m 52s
Java 8 (ubuntu-22.04)	1m 25s
Rust stable	55s
Java 8 (windows-latest)	2m 40s
Rust beta	56s
Java 17 (ubuntu-22.04)	1m 38s
Rust nightly	1m 2s
Java 17 (windows-latest)	2m 24s
Java 21 (ubuntu-22.04)	1m 43s
Java 21 (windows-latest)	2m 25s
	54m 24s

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