Bugfixes in handling of target properties across imports #3015

Job	Run time
check-diff / check	25s
check-labels / check	4s
lsp / test-lsp (ubuntu-latest)	6m 36s
cli / test-cli (ubuntu-latest)	3m 4s
building / build-toolchain (ubuntu-latest)	5m 26s
building / epoch / build-epoch	5m 13s
	20m 48s

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