Add Retry Logic

[EmmanuelOgiji]

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Description

It would be very useful if the operator supported retrying (i.e. just reapplying the same terraform config to a workspace). This is because there are a few terraform and even provider (like AWS) errors that can be resolved just by re-runs.

Potential Terraform Configuration

Ideally, this will just be part of the CRD (under spec) and support options like retry.limit, retry.delay and retry.exponentialBackoff e.g.

spec:
   ------
   retry:
     limit: 3
     delay: 10
     exponentialBackoff: true