release-23.2: ui: fix timezone formatting for bar charts

[blathers-crl]

Backport 1/1 commits from #115162 on behalf of @koorosh.

/cc @cockroachdb/release

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This change:

1. Fixes naming of UTC timezone that can be consumed by moment.js (more details: The special area of "Etc" is used for some administrative zones, particularly for "Etc/UTC" which represents Coordinated Universal Time (https://en.wikipedia.org/wiki/Tz_database#Area).
2. Propagate timezone property to calculateXAxisDomainBarChart func from barchart graph.

Epic: None

Release note (ui change): time on X-Axis of bar charts on Statement details page display correctly formatted time in UTC.

Resolves: #115091

After fix: both tooltip and X-Axis show time in UTC.

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Release justification: low risk, high benefit changes to existing functionality

[blathers-crl]

Thanks for opening a backport.

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[cockroach-teamcity]

This change is