Docs: relocate role creation guideline

[MaximilianHauer]

Description

Findings out of another PR we excluded to focus on in a later point of view
https://github.com/eclipse-tractusx/portal-iam/blob/main/docs/admin/technical-documentation/11.%20FAQ.md

• I think the company role question should be moved to the portal documentation as it doesn't have any connection to iam

• the portal role question should maybe be rewritten to be applicable to every shared service not just portal and the portal seeding/db updates should be moved into the portal docs

• I don't think this match between uuid in Keycloak and in portal is needed (at least not anymore): 1st to get the role id move into your browser open the user role configuration and copy the second UUID from the url. For adding the role into the portal seeding data some autogenerated uuid can be used

Acceptance Criteria

• [criteria 1]
• [criteria 2]
• [criteria 3]

Additional Information

[MaximilianHauer]

@Phil91 can you remember why we did the 3rd point ? i think we discussed on this with a reason but dont remember.
@evegufy fyi