Refactor: extract cairo compilation unit for target to separate function #5778

Job	Run time
check-rust	3m 41s
build test linux x86-64	6m 2s
check-website	14s
build test windows x86-64	6m 23s
scarb-metadata compatibility check	44s
doc tests	3m 10s
test linux x86-64 1/8	6m 11s
test linux x86-64 2/8	7m 55s
test linux x86-64 3/8	7m 19s
test linux x86-64 4/8	5m 37s
test linux x86-64 5/8	5m 4s
test linux x86-64 6/8	3m 27s
test linux x86-64 7/8	4m 9s
test linux x86-64 8/8	2m 43s
test windows x86-64 1/8	6m 4s
test windows x86-64 2/8	7m 53s
test windows x86-64 3/8	6m 43s
test windows x86-64 4/8	6m 17s
test windows x86-64 5/8	5m 20s
test windows x86-64 6/8	4m 17s
test windows x86-64 7/8	3m 58s
test windows x86-64 8/8	3m 48s
	1h 46m 59s

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