[Java] Upgrade to Shadow 8.3.6. #4122

Job	Run time
C++ Slow System Tests MSVC	25m 59s
C++ Slow System Tests GCC 14	22m 17s
C++ Slow System Tests Clang 19	22m 6s
JavaDoc (JDK 17, ubuntu-24.04)	1m 48s
Java Slow Tests (JDK 17, ubuntu-24.04)	20m 58s
JavaDoc (JDK 21, ubuntu-24.04)	1m 44s
Java Slow Tests (JDK 17, windows-latest)	25m 54s
Java Slow Tests (JDK 17, macos-latest)	19m 3s
C++ Sanitise Build Clang 19	1m 1s
C++ Sanitise Build GCC 14	26m 8s
Java Slow Tests (JDK 21, ubuntu-24.04)	21m 11s
Java Slow Tests (JDK 21, windows-latest)	25m 55s
Java Slow Tests (JDK 21, macos-latest)	20m 20s
Java Slow Tests (JDK 23, ubuntu-24.04)	21m 18s
Java Slow Tests (JDK 23, windows-latest)	25m 54s
Java Slow Tests (JDK 23, macos-latest)	19m 32s
	5h 1m 8s

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