CCM-14480: Centralize terraform module source configuration

[lapenna-bjss]

Description

Context

Type of changes

• Refactoring (non-breaking change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would change existing functionality)
• Bug fix (non-breaking change which fixes an issue)

Checklist

• I am familiar with the contributing guidelines
• I have followed the code style of the project
• I have added tests to cover my changes
• I have updated the documentation accordingly
• This PR is a result of pair or mob programming
• If I have used the 'skip-trivy-package' label I have done so responsibly and in the knowledge that this is being fixed as part of a separate ticket/PR.

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[aidenvaines-cgi]

Dont do this please Luca :D

[lapenna-bjss]

We can’t centralise the module sources because they cannot be dynamic. Terraform resolves module sources during init before it resolves vars and locals, so that approach will not work. We also agreed that wrapper modules are not a viable solution, so we’ll keep the source values static. Closing this PR.