Pass Scarb no proc macros flags to subprocesses. #9940

Job	Run time
build test windows x86-64	15m 24s
doc tests	1m 0s
build test linux x86-64	6m 2s
check-website	26s
build nightly test linux x86-64	2m 29s
scarb-metadata compatibility check	22s
check-rust	1m 15s
check-rust (nightly)	38s
test cairo-lang-macro linux x86-64	27s
test cairo-lang-macro windows x86-64	2m 29s
test nightly linux x86-64	1m 50s
snforge-init	1m 31s
test linux x86-64 1/4	7m 28s
test windows x86-64 2/4	9m 2s
test windows x86-64 1/4	12m 17s
test linux x86-64 3/4	5m 39s
test linux x86-64 2/4	5m 20s
test linux x86-64 4/4	4m 34s
test windows x86-64 4/4	10m 7s
test windows x86-64 3/4	9m 18s
	1h 37m 38s

Provide feedback