in table view datetime is interpreted as of browser's timezone.

[eclipsenn]

This might be another way to resolve #318.
Prerequisites:
grafana 8.4.4(fcfb01faeb)
plugin vertamedia-clickhouse-datasource @ 2.5.2

What happened:
in table view, datetime is interpreted as of browser's timezone.
Steps to reproduce:

• set system timezone as UTC+3;
• create table with datetime:

(
    dt DATETIME64,
    value Int64
)
ENGINE = MergeTree()
ORDER BY (dt)
SETTINGS index_granularity = 8192;

• insert values(60 time points starting 2022-09-28 12:00:00 UTC - 12:00:59 UTC):

insert into test(dt, value)
with timeseries_cte as (
    select toDateTime(number) as dt,
    mod(number, 10) as value
    from numbers(1664366400, 60)
)
select dt, value from timeseries_cte;

• add a panel with clickhouse datasource and the following query:

SELECT
    dt,
    --toTimezone(dt, 'UTC'),
    avg(value)
FROM market_risk.opst1228
GROUP BY dt
ORDER BY dt

• select table view;
  Expected behaviour: datetimes are interpreted as UTC and shown unmodified
  Actual behaviour: datetimes were interpreted as browser's timezone(UTC+3) and modified so it's 9:00:00, 9:00:01 etc

The similar issue #318 was closed as wontfix since there was no way to interpret server timezone from Clickhouse HTTP response. It seems it's possible now via x-clickhouse-timezone header.
x-clickhouse-timezone: UTC