Enable features for main package during integration tests compilation #7153

Job	Run time
scarb-metadata compatibility check	40s
check-rust	3m 35s
build test linux x86-64	4m 21s
check-website	13s
build test windows x86-64	8m 59s
doc tests	7m 54s
test linux x86-64 1/8	16m 31s
test linux x86-64 2/8	16m 27s
test linux x86-64 3/8	16m 17s
test linux x86-64 4/8	12m 15s
test linux x86-64 5/8	11m 54s
test linux x86-64 6/8	10m 14s
test linux x86-64 7/8	9m 17s
test linux x86-64 8/8	10m 15s
test windows x86-64 1/8	15m 1s
test windows x86-64 2/8	16m 15s
test windows x86-64 3/8	15m 10s
test windows x86-64 4/8	12m 21s
test windows x86-64 5/8	11m 46s
test windows x86-64 6/8	9m 23s
test windows x86-64 7/8	8m 26s
test windows x86-64 8/8	10m 22s
	3h 47m 36s

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