[YSQL] Bug: Connection Manager passes TimeZone in wrong case

[donBizzell]

Jira Link: DB-18236

Description

The timezone parameter is passed in all lowercase causing it not to be set.
Discovered by Bringq here are their notes:

Debugging this problem, I noticed that the QueryExecutorImpl class is receiving time zone parameters in lowercase - timezone - instead of TimeZone. That is causing the time zone not to be set.

when NOT using YSQL connection manager, the parameter is received in correct case

Tried setting the following, but did not help.
alter database dev01db set TimeZone=UTC;

alter user dev01 set TimeZone=UTC;

Steps to Reproduce:

1. [Provide steps to reproduce the bug]
2. [Describe actual vs expected behavior]e s

Issue Type

kind/bug

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