monitor/schema: support using atlas hcl file in monitor action #1395

Job	Run time
migrate-test	22s
migrate-down	17s
golangci-lint	10s
monitoring	41s
schema-plan	16s
schema-apply (lint-review)	14s
schema-plan-approve	0s
schema-apply (on-the-fly, true)	7s
schema-push	11s
schema-apply (remote-repo, atlas://atlas-action/plans/20240910183610, atlas://atlas-action?tag=e2e)	8s
schema-test	21s
schema-apply (local-plan, file://20240910173744.plan.hcl)	8s
schema-apply (multiple-envs, file://20240910173744.plan.hcl)	21s
shim	17s
schema-apply (legacy, v0.27.0, true)	9s
shim-e2e	6s
unit-tests	1m 10s
	4m 58s

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