Move tf formatting to GHA

[agnesgaroux]

Move the autoformat workflow to GHA Given that the release workflow depends on the formatting, this has to be moved as well The BK pipeline.yml can then be removed

Priority: currently failing on BK

• [x] https://github.com/wellcomecollection/terraform-aws-lambda
• [x] https://github.com/wellcomecollection/terraform-aws-acm-certificate
• [x] https://github.com/wellcomecollection/terraform-aws-secrets
• [x] https://github.com/wellcomecollection/terraform-aws-api-gateway-responses
• [x] https://github.com/wellcomecollection/terraform-aws-vhs

To do

• [x] https://github.com/wellcomecollection/terraform-aws-ecs-service
• [x] https://github.com/wellcomecollection/terraform-aws-sqs
• [x] https://github.com/wellcomecollection/terraform-aws-sns-topic