adding container for file service

Infrastructure Submissions:

File service requires a cosmos container named FileLocationEntity. This is part of the onboarding for file service, see issue #40 (closed) .

• [YES/NO] Have you added an explanation of what your changes do and why you'd like us to include them?
• [YES/NO] I have updated the documentation accordingly.
• [YES/NO/NA] I have added tests to cover my changes.
• [YES/NO/NA] All new and existing tests passed.
• [YES/NO/NA] I have formatted the terraform code. (terraform fmt -recursive && go fmt ./...)