feat: reuse precompiled objects of targets in srcs #289

Job	Run time
compilation_modes (fastbuild)	9m 53s
rbe	0s
distros (ubuntu-20.04)	9m 3s
coverage	1m 40s
distros (ubuntu-22.04)	9m 44s
compilation_modes (dbg)	10m 3s
sanitizers (asan)	1m 25s
compilation_modes (opt)	10m 41s
sanitizers (lsan)	1m 37s
sanitizers (tsan)	1m 29s
sanitizers (ubsan)	1m 19s
	56m 54s

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