HOFF-869 -Refactor notify component to enable email attachments

[shamiluwais]

What Refactor notify component to enable email attachments. HOFF-869

Why The notify component in the hof framework is not enabled to send attachments with gov.notify emails, which is a requirement of the ROTM service, please HOFF-814.

How Refactor the code to upload an attachment, without affecting other services that using the notify component to send emails.

Test Test on two or more services using the hof notify component in local and branch

Screenshots(optional)

Anything else(optional)

Check list

• [x] I have reviewed my own pull request for linting issues (e.g. adding new lines)
• [ ] I have written tests (if relevant)
• [x] I have created a JIRA number for my branch
• [ ] I have created a JIRA number for my commit
• [x] I have followed the chris beams method for my commit https://cbea.ms/git-commit/, here is an example commit
• [ ] Ensure drone builds are green especially tests
• [ ] I will squash the commits before merging