monitor/schema: support using atlas hcl file in monitor action (#299) #1398

Job	Run time
migrate-down	19s
monitoring	42s
golangci-lint	2m 33s
migrate-test	35s
schema-apply (lint-review)	10s
schema-plan	0s
schema-plan-approve	9s
schema-apply (on-the-fly, true)	15s
schema-push	9s
schema-apply (remote-repo, atlas://atlas-action/plans/20240910183610, atlas://atlas-action?tag=e2e)	21s
schema-test	8s
schema-apply (local-plan, file://20240910173744.plan.hcl)	10s
shim	14s
shim-e2e	6s
schema-apply (multiple-envs, file://20240910173744.plan.hcl)	9s
schema-apply (legacy, v0.27.0, true)	9s
unit-tests	1m 24s
	7m 33s

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