Pass Scarb no proc macros flags to subprocesses. #9942

Job	Run time
build test linux x86-64	6m 15s
build test windows x86-64	16m 11s
doc tests	56s
build nightly test linux x86-64	2m 20s
test cairo-lang-macro windows x86-64	2m 7s
scarb-metadata compatibility check	15s
check-rust (nightly)	38s
check-rust	1m 8s
test cairo-lang-macro linux x86-64	21s
check-website	26s
test nightly linux x86-64	1m 49s
snforge-init	1m 33s
test linux x86-64 2/4	5m 27s
test linux x86-64 4/4	4m 44s
test linux x86-64 1/4	7m 4s
test windows x86-64 1/4	13m 42s
test linux x86-64 3/4	5m 24s
test windows x86-64 4/4	8m 57s
test windows x86-64 2/4	10m 8s
test windows x86-64 3/4	8m 11s
	1h 37m 36s

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