fix: omit kind on nested per-kind ldctx entries for multi-kind contex… #475

Job	Run time
test-packaging	4m 41s
test-contract-tests	4m 33s
test-platforms-and-versions (ubuntu-latest, 11)	4m 4s
test-platforms-and-versions (ubuntu-latest, 8)	3m 42s
test-platforms-and-versions (ubuntu-latest, 17)	3m 40s
test-platforms-and-versions (ubuntu-latest, 19)	3m 57s
	24m 37s

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