Added Venue Data to confirmation emails

[ttran913]

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Closes #2229

Venue data will now be visible in attendee's confirmation emails. Added venue data(physicalLocation, streamingData, start_at, ends_at) to email-templates.ts. Modified confirmation related functions in event-email.ts to use the mentioned variables. Modified eventConfirmAttendeeEmail in resolver.ts to grab venue data. Modfied eventConfirmAttendeeEmail function to properly take in newly created parameters(streaming_url, venue_physical, venue_type, start_at, ends_at). The test fails without these parameters.

[ghost]

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