Fix Terraform Bugs

[lily-nicholls]

Description

Added required IAM permissions for the pipelines service account in the Terraform code in order to run the training & prediction pipelines. Added the location variable to the GCS module in the Terraform code so that it doesn't default to the EU.

How has this been tested?

I have successfully run the training and prediction pipelines in my own forked branch of this repository.

Checklist

• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have successfully run the E2E tests, and have included the links to the pipeline runs below
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] I have updated any relevant documentation to reflect my changes
• [ ] I have assigned a reviewer and messaged them

Pipeline run links:

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[lily-nicholls]

Ready for merge