chore: extract bootstrap into separate project with tests #2520

Job	Run time
jvm (8)	4m 23s
all-platforms (ubuntu-latest)	15m 44s
jvm (11)	4m 25s
all-platforms (macos-latest)	22m 13s
jvm (17)	4m 24s
all-platforms (windows-latest)	20m 52s
jvm (21)	4m 31s
	1h 16m 32s

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