fix: Passthrough condition in StaticInvoke case block

[EmilyMatt]

Which issue does this PR close?

Closes #1391 .

Rationale for this change

It is a logic error.

What changes are included in this PR?

Moved to a direct comparator instead of checking that Class isInstanceOf Class

How are these changes tested?

I believe this is an inherent language feature, it does not need a TestSuite.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 39.06%. Comparing base (f09f8af) to head (eb42ec9).
Report is 23 commits behind head on main.

Files with missing lines	Patch %	Lines
.../scala/org/apache/comet/serde/QueryPlanSerde.scala	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##               main    #1392       +/-   ##
=============================================
- Coverage     56.12%   39.06%   -17.06%     
- Complexity      976     2071     +1095     
=============================================
  Files           119      263      +144     
  Lines         11743    60746    +49003     
  Branches       2251    12909    +10658     
=============================================
+ Hits           6591    23733    +17142     
- Misses         4012    32530    +28518     
- Partials       1140     4483     +3343     

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[andygrove]

LGTM. I confirmed that this resolves the following compiler warning. Thanks @EmilyFlarionIO.

[WARNING] /Users/andy/git/apache/datafusion-comet/spark/src/main/scala/org/apache/comet/serde/QueryPlanSerde.scala:2131: non-variable type argument org.apache.spark.sql.catalyst.util.CharVarcharCodegenUtils in type Class[org.apache.spark.sql.catalyst.util.CharVarcharCodegenUtils] (the underlying of Class[org.apache.spark.sql.catalyst.util.CharVarcharCodegenUtils]) is unchecked since it is eliminated by erasure