add slots to DAQmx-property-containing classes #1302

Job	Run time
Run CI / Build / Build	1m 7s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.8)	48s
Run CI / Generate docs / Generate docs	52s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.9)	48s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.10)	45s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.11)	54s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.12)	1m 1s
Run CI / Run unit tests / Run unit tests (ubuntu-latest, 3.13)	1m 21s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.8)	1m 54s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.9)	1m 38s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.10)	1m 48s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.11)	1m 41s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.12)	1m 33s
Run CI / Run unit tests / Run unit tests (windows-latest, 3.13)	3m 29s
Run CI / Run system tests / Run system tests (win-10-py32)	40m 55s
Run CI / Run system tests / Run system tests (win-10-py64)	37m 8s
Run CI / Report test results / Report test results	10s
	1h 37m 52s

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