Version 92 migration fails due to hard-coded `public` schema

[ax-ncarroll]

When implementing migrations on a fresh DB, stage 92 fails when using a schema other than public due to a hard-coded reference:

https://github.com/reportportal/migrations/blob/develop/migrations/92_start_time_idx.up.sql#L3

relation "public.test_item" does not exist

[Pink-Bumblebee]

@ax-ncarroll , thank you for your highlight. I will ask our Dev Team to thoroughly review your issue.