atlasaction: change input prefix for Gitlab CI #1081

Job	Run time
golangci-lint	11s
migrate-down	22s
migrate-test	23s
schema-apply (lint-review)	17s
schema-plan	14s
schema-plan-approve	0s
schema-apply (on-the-fly, true)	11s
schema-apply (remote-repo, atlas://atlas-action/plans/20240910183610, atlas://atlas-action?tag=e2e)	13s
schema-push	11s
schema-apply (local-plan, file://20240910173744.plan.hcl)	12s
schema-test	13s
shim	12s
schema-apply (multiple-envs, file://20240910173744.plan.hcl)	11s
schema-apply (legacy, v0.27.0, true)	17s
shim-e2e	8s
unit-tests	1m 2s
	4m 17s

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