Add tests for MIG Manager dynamic config #2512

Job	Run time
validate-csv	32s
helm-lint	7s
validate-helm-values	29s
go-check	3m 7s
unit tests	39s
go-build	1m 38s
coverage	1m 46s
build-gpu-operator-arm64	-1s
build-gpu-operator-amd64	-1s
build-multi-arch-images	0s
e2e-tests-containerd	0s
e2e-tests-nvidiadriver	-1s
release-latest-gpu-operator-image	-1s
push-gpu-operator-bundle-image	0s
	8m 14s

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