Onr/dsos 2682/add test db instance

[robertsweetman]

• db instance in oasys-national-reporting-test is commented out for now
  • pending additions to config management repo
  • note, not all disks exist/are required for testing
• adds secrets for testing ONR db install/config automation
• changes some defaults

[github-actions]

TFSEC Scan Success

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</details> #### `Checkov Scan` Success
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CTFLint Scan Success

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Setting default tflint config...
Running tflint --init...
Installing "terraform" plugin...
Installed "terraform" (source: github.com/terraform-linters/tflint-ruleset-terraform, version: 0.5.0)
tflint will check the following folders:

Trivy Scan

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