EmailPlugin - Handler: loadData() function gets called on all event emissions

[chladog]

Describe the bug
loadData() of EmailHandler is being called for every emission of event (e.g. OrderStateTransition), not just when it passes the filter() resulting all queries in loadData being run on any order transition.

To Reproduce
Steps to reproduce the behavior:
-find any EmailHandler definition that listen to .on(OrderStateTransition)
-set filter(x => false) so it would never pass
-insert console.log('Hello World'); to its loadData function
-transition any order to any state
-check the spam in the console

Expected behavior
loadData function should be invoked only for transition that pass the filter() function in EmailHandler

Environment (please complete the following information):

• @vendure/core version: v16.1