build(deps): bump actions/setup-go from 6 to 7 #1906

Job	Run time
build-test (tofu)	2m 16s
omicron-version	8s
build-test (terraform)	3m 1s
publish-image	8s
acceptance / acceptance (terraform)	5m 30s
acceptance / acceptance (tofu)	7m 1s
	18m 4s

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