Allow setting time zone locally for `heroku logs`

[HaraldNordgren]

I don't necessarily want to change the time zone on my apps. But I want to have the option locally to influence the time zone display of heroku logs messages.

Seems that internally readLogsV2 make a request to https://va.logs.heroku.com/stream/... so possibly in there is where a new query parameter needs to be handled to influence output.

[R1DEN]

that would come in pretty handy

[kdabir]

The PR above was closed without merge. Is there any alternative that one can use (may be some local env variable)? Setting Server's TZ doesn't help has logs --tail still show UTC time.