bug(expr): support timezone in to_jsonb interface

[KeXiangWang]

Describe the bug

Currently, the impementation of ToJsonb interface does not consider timezone.

One example:

set TimeZone to 'America/New_York';
select to_jsonb('2024-01-01 00:00:00'::timestamptz);
# expected (DST)
"2024-01-01T00:00:00-05:00"
# RW's output
"2024-01-01T00:00:00+00:00"

The mismatch was introduced when we implement ToJsonb interface.

The fix is simple. We can simply implement the new function with #[captured_context(TIME_ZONE)] and without large modification.

The problem is back compatibility. As the old implementation and the new implementation shared the same signature, it would be hard to distinguish. If there were old data using the old implementation and also the data executed with the new implementation, inconsistency may emerge.

Two possible solution:

1. If we find the running Fragment's version is older than a release version, we throw errors and ask users to recreate the MV.
2. Add new singnatures like to_jsonb1 jsonb_agg1 and jsonb_object_agg1. Newly created MV will be always binded to the new singnatures.

[KeXiangWang]

Temporarily blocked by #14678

[github-actions]

This issue has been open for 60 days with no activity. Could you please update the status? Feel free to continue discussion or close as not planned.