Patching deployment bigint swap for missing index

What does this MR do and why?

This skips swapping the index index_deployments_on_id_and_status_and_created_at if it could not be found.

Somehow, some dedicated customers were missing this index.

Since this index is used for data analytics, it's not a mandatory index and is only applicable for SM customers.

This MR skips this index if it's not found, so at least it's consistent

References

Self-hosted docker upgrade from 18.10 to 18.11 ... (#597558 - closed)

This will be backported to 19.0, 18.11

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Before	After

How to set up and validate locally

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