fix(common-time): allow building nanos timestamp from parts split from i64::MIN

[zhongzc]

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What's changed and what's your intention?

Similar situation to chronotope/chrono#1289

Fix the underflow and add some helper constant variables about min/max timestamp.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR does not require documentation updates.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.30%. Comparing base (7c895e2) to head (007bc6b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3493      +/-   ##
==========================================
- Coverage   85.31%   85.30%   -0.01%     
==========================================
  Files         903      903              
  Lines      149659   149704      +45     
==========================================
+ Hits       127683   127707      +24     
- Misses      21976    21997      +21     

[killme2008]

LGTM

[fengjiachun]

LGTM