Security issue: MWAA has more access than it needs

[Almenon]

MWAA has "eks:*" access, but it does not need EKS access by default. It does not need S3 delete permissions by default either. Finally, I don't think it needs batch permissions.

#23 fixes this.

[monometa]

@vara-bonthu Hi, just a note: I believe that the issue was resolved by merging #49 and might be closed to avoid confusion