This table adds a new table called the `time_zones` table:
```
:) select * from system.time_zones limit 10;
SELECT *
FROM system.time_zones
LIMIT 10
┌─time_zone──────────┐
│ Africa/Abidjan │
│ Africa/Accra │
│ Africa/Addis_Ababa │
│ Africa/Algiers │
│ Africa/Asmara │
│ Africa/Asmera │
│ Africa/Bamako │
│ Africa/Bangui │
│ Africa/Banjul │
│ Africa/Bissau │
└────────────────────┘
10 rows in set. Elapsed: 0.012 sec.
```
The available timezones are parsed from under
`ClickHouse/contrib/cctz/testdata/zoneinfo` through a script
and the table content is constructed from the
StorageSystemTimeZones.generated.cpp`.
I was able to test this locally and was able to get a list of time
zones as shown above.
