[AC-1438] Updated SCIM controllers to respond with "content-Type: application/scim+json"

[r-tome]

Type of change

- [ ] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [X] Other

Objective

Microsoft reviewed our integration and provided the following feedback, as it is a requirement to add our integration to their catalog.

The content-Type: application/scim+json should be in the response header of all of our SCIM responses.

Code changes

• bitwarden_license/src/Scim/Controllers/v2/GroupsController.cs: Added content-Type: application/scim+json to responses
• bitwarden_license/src/Scim/Controllers/v2/UsersController.cs: Added content-Type: application/scim+json to responses
• bitwarden_license/test/Scim.IntegrationTest/Controllers/v2/GroupsControllerTests.cs: Asserting the response content type
• bitwarden_license/test/Scim.IntegrationTest/Controllers/v2/UsersControllerTests.cs: Asserting the response content type

Before you submit

• Please check for formatting errors (dotnet format --verify-no-changes) (required)
• If making database changes - make sure you also update Entity Framework queries and/or migrations
• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team

[eliykat]

I didn't know about the Produces attribute, easy fix.

[r-tome]

I didn't know about the Produces attribute, easy fix.

I only learnt about it to use it here. My initial idea was to configure this on Startup using Middleware or something similar to that. I'm glad this exists, its way cleaner.