Update workflow to use OIDC for deployment

[slesaad]

What am I changing and why

• Update workflow to use OIDC for deployment
• Added a DEPLOYMENT_ROLE_ARN repository secret which is the IAM role that Github workflow assumes to deploy

How to test

I tested it by adding test-oidc as one of the trigger branches, and updating the following values:

DOMAIN_PROD: /dashboard
DEPLOY_BUCKET_PROD: covid-eo-uat (confirmed that this was not being used anywhere else first)

This triggered the deployment.
Checked that it worked by grabbing the static website endpoint from the covid-eo-uat and appending /dashboard at the end. The VEDA dashboard looked as expected.
Also checked the cache invalidation in the cloudfront distribution, it worked as expected.

⚠️ Checks

• I have confirmed that updating the veda-ui submodule is needed and only done so if that's the case.

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[danielfdsilva]

Thank you @slesaad . This is great