Custom mutations for role assign

We need a custom mutation for updating admin and project lead roles to the user.

Linked FE ticket: https://git.ufz.de/rdm/biome/frontend/-/issues/475

AC

• isAdmin: true adds role admin to the user
• isAdmin: false removes role admin to the user
• isProjectLead: true adds role project lead to the user
• isProjectLead: false removes role admin to the user
• only user with admin role can manage admin roles for other users
• Tests

Review

• isAdmin: true adds role admin to the user
• isAdmin: false removes role admin to the user
• isProjectLead: true adds role project lead to the user
• isProjectLead: false removes role admin to the user
• only user with admin role can manage admin roles for other users
• Tests

mutation updateRoles(id: ID!, $admin: Boolean, $projectLead: Boolean) {
    userUpdateRoles(input: {id: $id, isAdmin: $admin, isProjectLead: $projectLead}) {
        user {
            id
        }
    }
}