Reorganize reusable text files

[IanMadd]

Description

• Reorganize reusable text files to match guidelines --> https://docs.chef.io/style/reuse/
• Fix a few bad links
• Reorganize shortcode files into layouts/shortcodes/inspec-aws/<shortcode>

Issues Resolved

https://chefio.atlassian.net/browse/CHEF-4267 https://chefio.atlassian.net/browse/CHEF-3002 https://chefio.atlassian.net/browse/CHEF-1340

Check List

Please fill box or appropriate ([x]) or mark N/A.

• [ ] New functionality includes integration tests/controls
• [ ] New Terraform resources
• [ ] Documentation provided or updated for resources
• [ ] All Integration Tests pass
• [ ] All Unit Tests pass
• [ ] rake lint passes
• [ ] All commits have been signed-off for the Developer Certificate of Origin. See https://github.com/chef/chef/blob/master/CONTRIBUTING.md#developer-certification-of-origin-dco

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