Chore: to_json unit/benchmark tests

[kazantsev-maksim]

Which issue does this PR close?

Part of: #2955

Rationale for this change

What changes are included in this PR?

How are these changes tested?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 66.66667% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.61%. Comparing base (f09f8af) to head (16b0c6c).
⚠️ Report is 805 commits behind head on main.

Files with missing lines	Patch %	Lines
...rc/main/scala/org/apache/comet/serde/structs.scala	50.00%	1 Missing and 5 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3011      +/-   ##
============================================
+ Coverage     56.12%   59.61%   +3.48%     
- Complexity      976     1374     +398     
============================================
  Files           119      167      +48     
  Lines         11743    15494    +3751     
  Branches       2251     2573     +322     
============================================
+ Hits           6591     9236    +2645     
- Misses         4012     4959     +947     
- Partials       1140     1299     +159     

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[kazantsev-maksim]

Comet to_json does not support NaN, +Infinity, -Infinity values for numeric types.