gitiles timestamps lack timezone details about gitiles HOT 2 OPEN

in this page you can see two timestamps:
https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/2b6e489fb5bbab066c8dd55167dc40d790c91bab

but there's no information to indicate what timezones those are in.  the reasonable
thing would be to assume they're localized, but we have way too many bad systems at
Google that blindly output PST or are otherwise local to the system/office.  adding
the explicit timezone (or the UTC offset) would make the output unambiguous & reliable
all the time.  all other git viewers i've used include this.

issue 5 covered normalizing the timestamps from various sources to one timezone which
is fine, but the final timezone should not be stripped.  collapsing them in the blame
output so as to get more content in the output is easy to do, but that's still unrelated
to displaying the timestamp in the log output (as quoted above).

Thanks for explicitly listing the separate concerns here.

I was actually interpreting the primary anti-timezone argument of issue 5 as "timezone
does not add any information [for Chrome], therefore it should be omitted." The "also
it's taking up valuable horizontal real estate" argument I thought was secondary. I
may have been weighting these incorrectly.

I think we can strip the timezone in blame only but not elsewhere. (Though if I get
pushback from the same people as issue 5 understand that it might not land :)