[LucaCappelletti94]

MySQL and Spark use the same keyword, operand parsing, and AST operator for DIV. One private helper keeps that grammar shared while each dialect retains its infix hook.

Addresses the DIV parsing duplication tracked in #2698.

Another echoes find.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.22%. Comparing base (72ce6a8) to head (266e9a8).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2718   +/-   ##
=======================================
  Coverage   82.22%   82.22%           
=======================================
  Files          42       42           
  Lines       35343    35339    -4     
  Branches    35343    35339    -4     
=======================================
- Hits        29060    29057    -3     
+ Misses       2716     2715    -1     
  Partials     3567     3567           

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