Use tempfile for parquet tests

[tustvold]

Which issue does this PR close?

Closes #1164

Rationale for this change

This avoids running the parquet tests from "leaking" random parquet files in your local filesystem. It also eliminates a reasonable amount of plumbing, and potential source of test concurrency bugs, with filenames being plumbed through the tests.

What changes are included in this PR?

This changes to using tempfile for temporary files, which is also used by arrow

Are there any user-facing changes?

No, the util module is marked experimental

[alamb]

Thanks @tustvold -- I took the liberty of merging from master and resolving a conflict as well, FYI

[codecov-commenter]

Codecov Report

Merging #1165 (cbe7815) into master (66b84f3) will decrease coverage by 0.01%.
The diff coverage is 98.96%.

@@            Coverage Diff             @@
##           master    #1165      +/-   ##
==========================================
- Coverage   82.66%   82.64%   -0.02%     
==========================================
  Files         173      173              
  Lines       50902    50865      -37     
==========================================
- Hits        42077    42039      -38     
- Misses       8825     8826       +1     

Impacted Files	Coverage Δ
parquet/src/util/test_common/file_util.rs	75.00% <ø> (-18.11%)	⬇️
parquet/src/arrow/arrow_writer.rs	97.87% <98.52%> (-0.21%)	⬇️
parquet/src/arrow/arrow_reader.rs	91.61% <100.00%> (ø)
parquet/src/arrow/schema.rs	85.56% <100.00%> (ø)
parquet/src/column/writer.rs	92.50% <100.00%> (ø)
parquet/src/file/footer.rs	95.32% <100.00%> (ø)
parquet/src/file/writer.rs	93.30% <100.00%> (ø)
parquet/src/util/io.rs	90.83% <100.00%> (+0.07%)	⬆️
arrow/src/datatypes/datatype.rs	66.38% <0.00%> (-0.43%)	⬇️
arrow/src/array/transform/mod.rs	85.43% <0.00%> (-0.14%)	⬇️
... and 2 more

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