Add Intelx, Hibp, and Cybersixgill to SQS

[aloftus23]

🗣 Description

fixes #2533

• Add memory to scanExecution Lambda. Recommended by Trusted Advisor

Add Intelx, Hibp, and Cybersixgill to SQS.

When adding a new scan you need to update or check these files:
- infrastructure/pe_worker.tf: add task definition and service. *Add any environment variables needed (API KEYS)
- infrastructure/vars.tf: Add queue_url and service_name
- infrastructure/stage.tfvars: same as above
- infrastructure/prod.tfvars: same as above
- infrastructure/worker.tf: add queue url to worker_task_execution_role_policy. *Add any environment variables needed (API KEYS)
- backend/env.yml: Add queue url and service name to environment variables. *Add any environment variables needed (API KEYS)
- dev.env.example: Do the same. *Add any environment variables needed (API KEYS)
- backend/serverless.yml: Create scan specific SQS queues
- backend/src/tasks/scanExecution.ts: Add “else if” in handler and define desired_count. *Add any environment variables needed (API KEYS)
- backend/worker/generate_config.sh: update any credentials needed in dataabse.ini
- backend/worker/pe-worker-entry.sh: Add to elif the command needed to run per org

🧪 Testing

Tested locally for all scan types.

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• Changes are limited to a single goal - eschew scope creep!
• All future TODOs are captured in issues, which are referenced
  in code comments.
• All relevant type-of-change labels have been added.
• I have read the CONTRIBUTING document.
• These code changes follow cisagov code standards.
• All relevant repo and/or project documentation has been updated
  to reflect the changes in this PR.
• Tests have been added and/or modified to cover the changes in this PR.
• All new and existing tests pass.

[cduhn17]

LGTM

[Matthew-Grayson]

Looks great!