Fix broken inheritance from DataFrameColumn class (#7324)

[asmirnov82]

Backport #7324 to release 4.0.1

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 68.88%. Comparing base (d92c0b3) to head (b351e33).
Report is 2 commits behind head on release/4.0.

Files with missing lines	Patch %	Lines
...sis/DataFrameColumns/ArrowStringDataFrameColumn.cs	0.00%	1 Missing ⚠️
...nalysis/DataFrameColumns/VBufferDataFrameColumn.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           release/4.0    #7331   +/-   ##
============================================
  Coverage        68.87%   68.88%           
============================================
  Files             1470     1470           
  Lines           274003   274003           
  Branches         28403    28403           
============================================
+ Hits            188716   188739   +23     
+ Misses           77967    77948   -19     
+ Partials          7320     7316    -4     

Flag	Coverage Δ
Debug	68.88% <0.00%> (+<0.01%)	⬆️
production	63.29% <0.00%> (+<0.01%)	⬆️
test	89.40% <ø> (+<0.01%)	⬆️

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

Files with missing lines	Coverage Δ
src/Microsoft.Data.Analysis/DataFrameColumn.cs	65.46% <ø> (ø)
...Analysis/DataFrameColumns/StringDataFrameColumn.cs	68.15% <ø> (ø)
...oft.Data.Analysis/PrimitiveDataFrameColumn.Sort.cs	87.80% <ø> (ø)
...sis/DataFrameColumns/ArrowStringDataFrameColumn.cs	59.16% <0.00%> (ø)
...nalysis/DataFrameColumns/VBufferDataFrameColumn.cs	44.57% <0.00%> (ø)

... and 4 files with indirect coverage changes

[ericstj]

It looks like we are only running APICompat for stable projects --

machinelearning/eng/BranchInfo.props

Line 35 in 23052ec

<PackageValidationBaselineVersion>$([MSBuild]::Subtract($(MajorVersion), 1)).0.0</PackageValidationBaselineVersion>

We should probably enable that for all of them. We still want to know when we break the others.