chore: migrate preconditions to use non-null error messages

[ata-nas]

Description

• migrate the preconditions class to use non-null error messages as seen in this comment

Related issue(s):

Fixes #381

Notes for reviewer:

• just some extra care in case I have missed something

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[jsync-swirlds]

Looks good, a few opportunities to make Javadoc a little cleaner, which could be done in a future PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.02%. Comparing base (72d8e84) to head (ee0e40f).
Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #415      +/-   ##
============================================
- Coverage     97.06%   97.02%   -0.04%     
+ Complexity      416      409       -7     
============================================
  Files            82       82              
  Lines          1465     1446      -19     
  Branches         96       89       -7     
============================================
- Hits           1422     1403      -19     
  Misses           32       32              
  Partials         11       11              

Files with missing lines	Coverage Δ
...a/com/hedera/block/common/utils/Preconditions.java	100.00% <100.00%> (ø)