feat(datagen): support timestamptz

[xiangjinwu]

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What's changed and what's your intention?

Resolves #8550. The same set of timestamp options can be used for timestamptz fields:

• max_past
• max_past_mode
• basetime

https://docs.risingwave.com/docs/current/ingest-from-datagen/#with-options---column_parameter

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added test labels as necessary. See details.
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
• All checks passed in ./risedev check (or alias, ./risedev c)
• My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)

• My PR contains critical fixes that are necessary to be merged into the latest release. (Please check out the details)

Documentation

• My PR needs documentation updates. (Please use the Release note section below to summarize the impact on users)

Release note

The datagen source can now generate timestamptz columns.

[codecov]

Codecov Report

Attention: 24 lines in your changes are missing coverage. Please review.

Comparison is base (fb7fa70) 68.39% compared to head (69fd5a3) 68.39%.
Report is 3 commits behind head on main.

Files	Patch %	Lines
src/connector/src/source/datagen/source/reader.rs	0.00%	14 Missing ⚠️
src/common/src/array/data_chunk.rs	0.00%	7 Missing ⚠️
src/common/src/field_generator/timestamp.rs	81.25%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13451   +/-   ##
=======================================
  Coverage   68.39%   68.39%           
=======================================
  Files        1501     1501           
  Lines      258488   258536   +48     
=======================================
+ Hits       176794   176828   +34     
- Misses      81694    81708   +14     

Flag	Coverage Δ
rust	68.39% <55.55%> (+<0.01%)	⬆️

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