Generate random Timezone IDs

### Please describe why you are requesting a feature
It would go well with random locale.

### Please provide a code example of what you are trying to achieve
```csharp

var faker = new Bogus.Faker();
faker.Random.RandomTimezoneId();

Expected output: "America/Argentina/San_Juan"
```

A list of timezone IDs I've found: https://raw.githubusercontent.com/mattjohnsonpint/TimeZoneNames/main/src/TimeZoneNames.DataBuilder/data/zone-precedence.txt

* Is the feature something that currently cannot be done?
No

* What alternatives have you considered?
Randomizing from a list

* Is this feature request any issues or current problems?
No

* Has the feature been requested in the past?
No

**If the feature request is approved, would you be willing to submit a PR?**
No

Start at the faker.Random.RandomTimezoneId() entry point shown in the issue and compare it with the existing random locale functionality. Review the linked timezone ID list as the proposed data source; done means the new API returns valid timezone IDs such as "America/Argentina/San_Juan".

Written by the indexing model from the issue text.