* Reduce "choose plan" reliance on the old schema
* Fix team members usage computation on teams schema
* Switch CreateInvitation to reading from team schemas behind FF (WIP)
* Allow test-inviting one guest into multiple sites
* Convert another test case where team members count is wrong
cc @zoldar
* WIP: support site transfer notification e-mails
* Even more strict SiteTransfer fetching
* Make skipping permissions work
* Make CreateInvitation read from team schemas behind FF fully
* Fix passing options to `check_invitation_permissions`
* Fix allowance check for pageview usage for active or recently ended trial case
* Fix `check_invitation_permissions`
* Remove no longer relevant invite implementations for Teams
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Co-authored-by: Adrian Gruntkowski <adrian.gruntkowski@gmail.com>
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