feat(module-source): Add XS specific variant #9840

Job	Run time
cover (18.x, ubuntu-latest)	2m 0s
lint	10m 52s
cover (20.x, ubuntu-latest)	1m 46s
test (18.x, ubuntu-latest)	3m 17s
test262 (18.x, ubuntu-latest)	35s
test-async-hooks (18, ubuntu-latest)	33s
test (20.x, ubuntu-latest)	3m 2s
test262 (20.x, ubuntu-latest)	27s
test-async-hooks (20, ubuntu-latest)	32s
test (22.4.1, ubuntu-latest)	2m 59s
test-xs (20.x, 5.0.0, ubuntu-latest)	36s
viable-release (18.x, ubuntu-latest)	6m 29s
viable-release (20.x, ubuntu-latest)	6m 11s
	39m 19s

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