Add JVM_DIRECTORY constant #521

Job	Run time
🔗 Get PR number if present	3s
🛠️ Setup build variables	1s
☕ Build Jvm / Build Jvm artifacts	8m 49s
🐧 Build Linux / Build editor release x86_64 (target=editor)	38m 11s
🐧 Build Linux / Build editor debug (target=editor, debug_symbols=true )	51m 39s
🐧 Build Linux / Build editor dev (target=editor, dev_build=yes, debug_symbols=true )	31m 10s
🐧 Build Linux / Build release template x86_64	25m 29s
🐧 Build Linux / Build debug template x86_64	25m 53s
🐧 Test Linux Exports / dev tests	9m 24s
🐧 Test Linux Exports / release tests	9m 21s
🐧 Test Linux / dev tests	9m 14s
🐧 Test Linux / release tests	8m 47s
	3h 38m 1s

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