Experimental: Native CSV files read

[kazantsev-maksim]

Which issue does this PR close?

• N/A

Rationale for this change

Added an experimental implementation of native CSV file reading (currently only for DataSourceV2 version)

Required improvements:

1. Conduct more benchmark tests
2. Try to implement the idea from - Implement native parsing of CSV files #882
3. Test reading files from S3/HDFS (currently only tested on local files)

Results of simple benchmark test (1 iteration): native_csv_read.txt

How are these changes tested?

1. Added new unit test
2. Added simple benchmark test

[comphead]

nice, would love to see benches )

[parthchandra]

Shouldn't CSV be a file format and part of ScanExec?

[codecov-commenter]

Codecov Report

❌ Patch coverage is 84.92063% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.64%. Comparing base (f09f8af) to head (a21ae07).
⚠️ Report is 845 commits behind head on main.

Files with missing lines	Patch %	Lines
...pache/spark/sql/comet/CometCsvNativeScanExec.scala	84.21%	4 Missing and 5 partials ⚠️
...n/scala/org/apache/comet/rules/CometScanRule.scala	76.92%	2 Missing and 4 partials ⚠️
...cala/org/apache/comet/serde/operator/package.scala	92.85%	0 Missing and 2 partials ⚠️
...n/scala/org/apache/comet/rules/CometExecRule.scala	50.00%	0 Missing and 1 partial ⚠️
...n/scala/org/apache/spark/sql/comet/operators.scala	80.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3044      +/-   ##
============================================
+ Coverage     56.12%   59.64%   +3.51%     
- Complexity      976     1381     +405     
============================================
  Files           119      169      +50     
  Lines         11743    15618    +3875     
  Branches       2251     2592     +341     
============================================
+ Hits           6591     9315    +2724     
- Misses         4012     4995     +983     
- Partials       1140     1308     +168     

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[kazantsev-maksim]

Thanks @parthchandra, you are absolutely right. In the first phase, I wanted to implement it only for DataSourceV2 to check the performance improvement. I hope to finish the benchmark tests in the coming days.