Correct issues in the build dir cudf-config.cmake

[robertmaynard]

Resolves two outstanding issues with the build directory cudf-config.cmake.

• The arrow_static wasn't being marked as a GLOBAL import target and therefore not seen by consumers
• The logic to mark the libcudacxx include directory as non-system was incorrect and only worked for install directory versions of the cudf-config. This corrects that oversight.

[codecov]

Codecov Report

Merging #9386 (e50b52a) into branch-21.12 (ab4bfaa) will decrease coverage by 0.03%.
The diff coverage is 1.97%.

@@               Coverage Diff                @@
##           branch-21.12    #9386      +/-   ##
================================================
- Coverage         10.79%   10.75%   -0.04%     
================================================
  Files               116      116              
  Lines             18869    19487     +618     
================================================
+ Hits               2036     2096      +60     
- Misses            16833    17391     +558     

Impacted Files	Coverage Δ
python/cudf/cudf/core/_base_index.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/column/categorical.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/column/column.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/column/datetime.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/column/numerical.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/column/string.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/column/timedelta.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/dataframe.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/frame.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/index.py	0.00% <0.00%> (ø)
... and 77 more

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[robertmaynard]

@gpucibot merge

[ajschmidt8]

Approving ops-codeowner file changes