feat: Add data residency for eu and global regions

[shrutiburman]

Related ticket: DII-1228 Reference doc

Fixes

A short description of what this PR does.

Checklist

• [x] I acknowledge that all my contributions will be made under the project's license
• [ ] I have made a material change to the repo (functionality, testing, spelling, grammar)
• [ ] I have read the Contribution Guidelines and my PR follows them
• [ ] I have titled the PR appropriately
• [ ] I have updated my branch with the main branch
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added the necessary documentation about the functionality in the appropriate .md file
• [ ] I have added inline documentation to the code I modified

If you have questions, please file a support ticket.

[gladysmae08]

I'd recommend adding some info in the README or Example Use cases, unless you think this is adequately documented in the Sendgrid API Documentation

[shrutiburman]

I'd recommend adding some info in the README or Example Use cases, unless you think this is adequately documented in the Sendgrid API Documentation

I have added an example folder for now. The documentation change is planned but not in place yet.