Fix orc reader assert on create data_type

[davidwendt]

The following error shows in the gtests/ORC_TEST when run under libcudf built with Debug.

[ RUN      ] OrcWriterNumericTypeTest/0.SingleColumn
ORC_TEST: ../include/cudf/types.hpp:267: cudf::data_type::data_type(cudf::type_id, int32_t): Assertion `id == type_id::DECIMAL32 || id == type_id::DECIMAL64' failed.
Aborted (core dumped)

The assert occurs in the data_type constructor meant for fixed-point types only.

cudf/cpp/include/cudf/types.hpp

Lines 265 to 268 in 96c0706

	explicit data_type(type_id id, int32_t scale) : _id{id}, _fixed_point_scale{scale}
	{
	assert(id == type_id::DECIMAL32 || id == type_id::DECIMAL64);
	}

The orc reader implementation is using this ctor for all types and just passing 0 for the scale value when not a fixed-point type.
The assert only occurs in a debug build.

This PR changes the logic to call the appropriate data_type constructor depending on the type-id of the parsed column.

[codecov]

Codecov Report

Merging #8174 (01a1756) into branch-0.20 (51336df) will decrease coverage by 0.03%.
The diff coverage is n/a.

❗ Current head 01a1756 differs from pull request most recent head dd4c525. Consider uploading reports for the commit dd4c525 to get more accurate results

@@               Coverage Diff               @@
##           branch-0.20    #8174      +/-   ##
===============================================
- Coverage        82.88%   82.85%   -0.04%     
===============================================
  Files              103      104       +1     
  Lines            17668    17881     +213     
===============================================
+ Hits             14645    14816     +171     
- Misses            3023     3065      +42     

Impacted Files	Coverage Δ
python/cudf/cudf/core/tools/datetimes.py	80.42% <0.00%> (-4.11%)	⬇️
python/cudf/cudf/core/abc.py	87.50% <0.00%> (-3.99%)	⬇️
python/cudf/cudf/core/column/decimal.py	91.04% <0.00%> (-1.89%)	⬇️
python/cudf/cudf/core/column/datetime.py	88.03% <0.00%> (-1.88%)	⬇️
python/cudf/cudf/core/column/struct.py	94.73% <0.00%> (-1.56%)	⬇️
python/cudf/cudf/utils/dtypes.py	82.20% <0.00%> (-1.24%)	⬇️
python/dask_cudf/dask_cudf/groupby.py	91.28% <0.00%> (-0.88%)	⬇️
python/cudf/cudf/core/series.py	91.17% <0.00%> (-0.56%)	⬇️
python/cudf/cudf/core/index.py	92.52% <0.00%> (-0.55%)	⬇️
python/cudf/cudf/core/column/column.py	88.20% <0.00%> (-0.44%)	⬇️
... and 30 more

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[vuule]

@gpucibot merge