Allow iam-policy-for-s3 to accept S3 buckets as variables

[thekcsam]

Description

Currently, the module only allow access to the S3 bucket which follows certain naming convention.
We should allow user to decide what S3 buckets they would like to have access to.

terraform/iam/iam-policy-for-s3/main.tf

Line 58 in 5d9f991

"arn:aws:s3:::${project.name}-storage"