chore(ci): add CI_PROVIDER toggle between Blacksmith and GitHub-hoste… #22878

Job	Run time
Detect Version	2s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS)	1m 9s
Build AMD64 (./docker/pii.Dockerfile, ghcr.io/simstudioai/pii, ECR_PII)	3m 37s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP)	8m 56s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME)	54s
Test and Build / Lint and Test	11m 7s
Test and Build / Build App	16m 21s
Migrate Dev DB	0s
Check Docs Changes	0s
Deploy Trigger.dev (Dev)	0s
Build Dev ECR	0s
Build ARM64 (GHCR Only)	-5s
Migrate DB	0s
Promote Images	1s
Process Docs	0s
Create GHCR Manifests	1s
Create GitHub Release	1s
	42m 4s

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