fix flaky test TimeTest.testBetweenWithMask

[asolntsev]

Sometimes the test failed when

• "moment + 1 second" appeared to be in tomorrow, or
• "moment - 1 second" appeared to be in yesterday

Example of failed build:
https://github.com/datafaker-net/datafaker/actions/runs/23998847901/job/69991488685?pr=1789

Expecting actual:
  23:59:22
to be strictly before:
  00:00:00.106916777

	at net.datafaker.providers.base.TimeTest.testBetweenWithMask(TimeTest.java:107)

[what-the-diff]

PR Summary

• Simplified Time Unit Conversion
  Imported DAYS and MINUTES from java.util.concurrent.TimeUnit, streamlining the process of converting these units into seconds. This makes our code more precise and comprehensible.

• Updated Time Generating Method for Testing
  The testBetweenWithMask method, which generates a random moment in time for testing purposes, has been revised to use seconds instead of nanoseconds. This results in more manageable data within our tests.

• Improved Assertions in Testing Method
  The assertions (checks to verify certain conditions are met) within the testBetweenWithMask method have been updated to use isAfterOrEqualTo and isBeforeOrEqualTo. This allows for a broader time range during checks, ensuring our tests cover all possible scenarios.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.39%. Comparing base (47f4512) to head (295c42b).
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Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1790      +/-   ##
============================================
+ Coverage     92.28%   92.39%   +0.10%     
- Complexity     3445     3448       +3     
============================================
  Files           339      339              
  Lines          6794     6794              
  Branches        670      670              
============================================
+ Hits           6270     6277       +7     
+ Misses          356      353       -3     
+ Partials        168      164       -4     

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