Add step to force update user's highest role in seeding script

What does this MR do and why?

part of https://gitlab.com/gitlab-org/gitlab/-/issues/362533

• Add step to force update user's highest role in seeding script, so that using_license_seats field is returning the correct value.
• Seed admin token for cloud_activation suite

Screenshots or screen recordings

Test result - https://gitlab.com/gitlab-org/gitlab-qa/-/jobs/2565307389

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

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