Procedural macro compilation #4729

Job	Run time
build test linux x86-64	2m 41s
build test windows x86-64	4m 32s
check-rust	3m 33s
check-website	10s
scarb-metadata compatibility check	39s
test linux x86-64 1/8	3m 34s
test linux x86-64 2/8	4m 4s
test linux x86-64 3/8	4m 1s
test linux x86-64 4/8	3m 4s
test linux x86-64 5/8	3m 41s
test linux x86-64 6/8	2m 7s
test linux x86-64 7/8	2m 16s
test linux x86-64 8/8	1m 45s
test windows x86-64 1/8	3m 50s
test windows x86-64 2/8	4m 9s
test windows x86-64 3/8	3m 59s
test windows x86-64 4/8	3m 24s
test windows x86-64 5/8	4m 42s
test windows x86-64 6/8	2m 31s
test windows x86-64 7/8	2m 40s
test windows x86-64 8/8	2m 7s
	1h 3m 29s

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