[#542] Update permission should change roles/groups/accounts

[roberlander2]

Description

This PR fixes the system update permission API handler to correctly update roles, groups, accounts, and service accounts that have been granted the permission being updated.
Depends on #547 and #551

Resolves #542

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[shurwit]

Thanks @roberlander2, looking close! Just one comment below

[shurwit]

Thanks @roberlander2, looks good! Just one comment below

[petyos]

It looks good to me. Thanks.