Move csv Parser trait and its implementations to utils module

[sum12]

Which issue does this PR close?

spill over form #1301

Rationale for this change

This one just moves code around does some touch up as suggested there.

What changes are included in this PR?

Along with moving code it also implements parse_formatted for date32 type and removes the redundant match on self::DATA_TYPE

Are there any user-facing changes?

[codecov-commenter]

Codecov Report

Merging #1385 (7f6d65c) into master (ab41c25) will increase coverage by 0.00%.
The diff coverage is 65.21%.

@@           Coverage Diff           @@
##           master    #1385   +/-   ##
=======================================
  Coverage   83.10%   83.10%           
=======================================
  Files         181      182    +1     
  Lines       53244    53236    -8     
=======================================
- Hits        44247    44243    -4     
+ Misses       8997     8993    -4     

Impacted Files	Coverage Δ
arrow/src/csv/reader.rs	89.89% <ø> (+1.56%)	⬆️
arrow/src/util/reader_parser.rs	65.21% <65.21%> (ø)
arrow/src/array/transform/mod.rs	86.20% <0.00%> (-0.23%)	⬇️
parquet_derive/src/parquet_field.rs	66.21% <0.00%> (ø)
arrow/src/datatypes/datatype.rs	66.80% <0.00%> (+0.39%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ab41c25...7f6d65c. Read the comment docs.

[alamb]

Thanks @sum12

Other than the pub vs pub(crate) thing, this looks like a good change to me!

[alamb]

Thanks @sum12 -- the integration test is failing due to #1398 (not changes in this PR) -- I am trying to figure out what is happening

[alamb]

I merged master into this PR to get the fix for #1398

Assuming the CI checks pass, I'll plan to merge it in