WPB-11183 Remove wrong templates and make email sending no op#4315

battermann merged 4 commits intodevelopwireapp/wire-server:developfrom

WPB-11183-be-confirmation-email-after-team-creation-and-account-migration-of-the-team-ownerwireapp/wire-server:WPB-11183-be-confirmation-email-after-team-creation-and-account-migration-of-the-team-ownerCopy head branch name to clipboard