The job trace logs section parser computes section
durations for the UIs by computing differences in
epoch timestamps between the sections.

However, when building the string represntation of
the duration in MM:SS, its reliance on the Time
library and the epoch time
(0 seconds -> 00:00, extracted from 1970-01-01 00:00:00)
means that it can be influenced by the timezone of the
install host.

When timezone of the host uses non-UTC types and involves
an offset, such as +0530 (India Standard Time) then the
UI displayed section durations of 00:NN as 30:NN.

This change forces a UTC conversion of the computed
epoch time from the seconds, which should help with
showing the right duration values regardless of local
timezone.

Closes issue: https://gitlab.com/gitlab-org/gitlab/-/issues/332296

Changelog: fixed