fix: signature request order and retrying

[ChaoticTempest]

This fixes:

• signature retrying constantly even after request has fully timeout on contract. This adds in total generation timeout to alleviate that.
• signature request ordering is very arbitrary. Could likely go into a case where we don't pick the signature request and it starves. This fixes that by adding insertion order into the requests as one of the metrics for choice.

[volovyks]

LGTM

[github-actions]

Terraform Feature Environment Destroy (dev-779)

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Pusher: @ppca, Action: pull_request, Working Directory: ``, Workflow: Terraform Feature Env (Destroy)