PrimitiveDataFrameColumn.Clone method crashes when is used with IEnumerable mapIndices argument

[asmirnov82]

In frame of this PR:

1) Cover PrimitiveDataFrameColumn.Clone method with additional unit tests 2) Use Span.Fill method to init NullValidityBuffer instead of setting individual bits in a cycle inside AppendMany (value, count) method

`lastNullBitMapBuffer.RawSpan.Slice(lastNullBitMapBuffer.Length - nullBufferAllocatable, BitmapHelper.SetBits(lastNullBitMapBuffer.RawSpan, originalBufferLength, allocatable, true);

3) Fixes #6821

Root cause: using of ret[curRow] = value; for empty column. changed to ret.Append(value);

Additionaly fix returning columns with parent column type for inheritors of PrimitiveDataFrame in Clone method

4) Refactoring: Fixing 3 and 2 allowed to get rid of _internal bool modifyNullCountWhileIndexing field.

[codecov[bot]]

Codecov Report

Merging #6822 (9654516) into main (85ee6e5) will increase coverage by 0.00%. The diff coverage is 90.82%.

@@           Coverage Diff            @@
##             main    #6822    +/-   ##
========================================
  Coverage   69.05%   69.05%            
========================================
  Files        1237     1237            
  Lines      253422   253600   +178     
  Branches    26546    26568    +22     
========================================
+ Hits       175002   175132   +130     
- Misses      71467    71521    +54     
+ Partials     6953     6947     -6     

Flag	Coverage Δ
Debug	69.05% <90.82%> (+<0.01%)	:arrow_up:
production	63.61% <73.97%> (-0.02%)	:arrow_down:
test	88.88% <99.31%> (+0.02%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...icrosoft.Data.Analysis/PrimitiveDataFrameColumn.cs	84.27% <100.00%> (+2.87%)	:arrow_up:
test/Microsoft.Data.Analysis.Tests/BufferTests.cs	99.64% <99.31%> (-0.36%)	:arrow_down:
...icrosoft.Data.Analysis/PrimitiveColumnContainer.cs	84.43% <71.21%> (-1.70%)	:arrow_down:

... and 7 files with indirect coverage changes

[asmirnov82]

@JakeRadMSFT could you please take a look?