build: simplify unit test target names #1263

Job	Run time
list	26s
workflow (devkit-core-tests)	46s
workflow (devkit-core-tests-rerun)	45s
workflow (build-cli)	1m 0s
workflow (build-unit-tests)	1m 0s
workflow (modules-builder-tests)	54s
	4m 51s

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