Fix pagniator issue in different timezone

When we generate cursor info, we should not use below format

field_value.strftime('%Y-%m-%d %H:%M:%S.%N %Z')

JiHu GitLab set Rails Time.zone = 'Asia/Shanghai', which will generate
'2022-07-05 11:17:50.948163000 CST', CST means 'China Standard Time',
however when rails try to use this time to build sql, it need convert
time to UTC format, which consider 'CST' as 'Central Standard Time',
then sql will query data with wrong time.

We should use 'field_value.to_s(:inspect)', same as
field_value.strftime('%Y-%m-%d %H:%M:%S.%N %z'), "%z" instead of "%Z",
wihch generate below format

"2022-07-05 16:45:02.933753000 +0800"

the specific timezone info will make converting UTC time in sql
correctly.

Changelog: fixed
EE: true