[REVIEW] Add column names validation in parquet writer

[galipremsagar]

Fixes: #7738

Parquet writer requires all column names to be of string types, added a validation similar to that of pandas.

[kkraus14]

@gpucibot merge

[codecov]

Codecov Report

Merging #7786 (9880b09) into branch-0.19 (7871e7a) will increase coverage by 0.82%.
The diff coverage is n/a.

❗ Current head 9880b09 differs from pull request most recent head 400883f. Consider uploading reports for the commit 400883f to get more accurate results

@@               Coverage Diff               @@
##           branch-0.19    #7786      +/-   ##
===============================================
+ Coverage        81.86%   82.69%   +0.82%     
===============================================
  Files              101      101              
  Lines            16884    17437     +553     
===============================================
+ Hits             13822    14419     +597     
+ Misses            3062     3018      -44     

Impacted Files	Coverage Δ
python/cudf/cudf/core/column/lists.py	87.32% <0.00%> (-4.08%)	⬇️
python/dask_cudf/dask_cudf/backends.py	87.50% <0.00%> (-2.13%)	⬇️
python/cudf/cudf/core/column/decimal.py	93.84% <0.00%> (-1.03%)	⬇️
python/cudf/cudf/core/column/column.py	87.53% <0.00%> (-0.23%)	⬇️
python/cudf/cudf/utils/utils.py	85.36% <0.00%> (-0.07%)	⬇️
python/cudf/cudf/io/feather.py	100.00% <0.00%> (ø)
python/cudf/cudf/utils/ioutils.py	78.71% <0.00%> (ø)
python/cudf/cudf/comm/serialize.py	0.00% <0.00%> (ø)
python/cudf/cudf/_fuzz_testing/io.py	0.00% <0.00%> (ø)
python/cudf/cudf/core/column/struct.py	100.00% <0.00%> (ø)
... and 44 more

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