Add "Enterprise" badge to users that are provisioned via SAML/SCIM

📖 What does this MR do?

Related to #325712 (closed)

Adds an "Enterprise" badge to group members that were provisioned via SAML/SCIM.

💻 Local testing

Setting up SAML locally can be a bit tricky so instead we can just update a user so they behave like they were provisioned with SAML/SCIM

1. Create a group and add some users
2. Make note of the group ID listed in Group overview under the group name.
3. bin/rails console
4. user = User.find_by_username('<username of a member in your group>')
5. user.user_detail.provisioned_by_group_id = <group id>
6. user.save

📷 Screenshots

View	Before	After
Group
Subgroup
Project in group namespace

🚦 Does this MR meet the acceptance criteria?

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