fix(ci): unblock next release checks

[AztecBot]

Summary

• Guard POSIX-only EINTR retry state in the random engine so the Windows cross-build does not fail on unused variables.
• Make the rollup-contract deployment job timeout configurable and default it to 20m for scenario deploys, avoiding the 10m Terraform wait timeout hit by the v5 scenario jobs.

CI failures addressed

• ./bootstrap.sh build_preset amd64-windows failed at barretenberg/cpp/src/barretenberg/numeric/random/engine.cpp with unused MAX_EINTR_RETRIES on Windows.
• ci/x-v5-scenario-1 and ci/x-v5-scenario-2 failed while waiting for deploy-rollup-contracts to complete within Terraform's 10m timeout.

Testing

• terraform fmt -check spartan/terraform/deploy-rollup-contracts
• terraform -chdir=spartan/terraform/deploy-rollup-contracts init -backend=false -input=false
• terraform -chdir=spartan/terraform/deploy-rollup-contracts validate
• bash -n spartan/scripts/deploy_network.sh
• git diff --check
• cd barretenberg/cpp && ./bootstrap.sh build_preset amd64-windows

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Created by claudebox · group: slackbot