[server] Add ignorePermissions to UpdateThreadOptions
[server] Add ignorePermissions to UpdateThreadOptions

Summary: This is necessary to allow us to call `updateThread` in the context of the soft launch migration script.

Test Plan: Will be tested in combination with following diffs

Reviewers: atul

Reviewed By: atul

Subscribers: KatPo, palys-swm, Adrian

Differential Revision: https://phabricator.ashoat.com/D1244

Ashoat/squadcal,Ashoat/squadcal,Ashoat/squadcal,Ashoat/squadcal,Ashoat/squadcal,Ashoat/squadcal,Ashoat/squadcal