feat(documentation): Improvements in the required permissions

[felipecosta09]

Proposed Changes

• Add a json policy file describing specific permissions that a user willing to deploy file storage security must has;
• Provide instruction on the [required-permissions.md](https://github.com/trendmicro/cloudone-filestorage-deployment-templates/blob/master/aws/required-permissions.md) on how to add the policy and attach to a user.

[felipecosta09]

Looks good couple of minor chages.

Thanks a lot for the commits, all very helpful!

All done!

[felipecosta09]

You missed a suggested change - line 23. Otherwise looks good. Please fix.

Hi @davidblanchard123 The line 23 is showing that your suggestion in pending in the review but if you go to the file, the change was made already: https://github.com/trendmicro/cloudone-filestorage-deployment-templates/blob/f8402f37e2ca96504f9a92c5ae07432d7c7ed88c/aws/required-permissions.md