chore: Add ipc batch count metric to columnar shuffle [WIP]

[andygrove]

Which issue does this PR close?

Closes #.

Rationale for this change

What changes are included in this PR?

How are these changes tested?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 94.87179% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.55%. Comparing base (f09f8af) to head (1eb2b1b).
⚠️ Report is 835 commits behind head on main.

Files with missing lines	Patch %	Lines
...ion/shuffle/CometBypassMergeSortShuffleWriter.java	75.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3066      +/-   ##
============================================
+ Coverage     56.12%   59.55%   +3.42%     
- Complexity      976     1383     +407     
============================================
  Files           119      167      +48     
  Lines         11743    15546    +3803     
  Branches       2251     2577     +326     
============================================
+ Hits           6591     9258    +2667     
- Misses         4012     4989     +977     
- Partials       1140     1299     +159     

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