Better UX on Microsoft Teams notification integration

Summary

Message UI on Microsoft Teams notification integration can be improved as almost 3 years passed after the initial feature was introduced in gitlab-foss!10412 (merged) with no (UI) updates.

(adapted from gitlab-foss!10412 (merged))

(adapted from https://devblog.axway.com/dev-insights/link-gitlab-and-microsoft-teams/)

Resources at GitLab

• Microsoft Teams notification integration: https://docs.gitlab.com/ee/user/project/integrations/microsoft_teams.html

External resources

• Microsoft Teams Product Top (Microsoft): https://products.office.com/en-us/microsoft-teams/group-chat-software

What is the current bug behavior?

A user sees "Detail", "Attachments" and extra spaces around them on posts from Microsoft Teams notification.

What is the expected correct behavior?

A user should not see "Detail", "Attachments" and extra spaces around them but more meaningful information on posts from Microsoft Teams notification.

Possible fixes

Updates notification generator for Microsoft Teams.