ARROW-4734: [Go] Add option to write a header for CSV writer

[anson627]

@sbinet

[codecov-io]

Codecov Report

Merging #3866 into master will decrease coverage by 0.2%.
The diff coverage is 75.6%.

@@            Coverage Diff             @@
##           master    #3866      +/-   ##
==========================================
- Coverage   87.78%   87.58%   -0.21%     
==========================================
  Files         727      653      -74     
  Lines       87892    84092    -3800     
  Branches     1252        0    -1252     
==========================================
- Hits        77158    73653    -3505     
+ Misses      10616    10325     -291     
+ Partials      118      114       -4

Impacted Files	Coverage Δ
go/arrow/csv/writer.go	91.56% <71.42%> (-4.09%)	⬇️
go/arrow/csv/reader.go	80.19% <77.77%> (-0.24%)	⬇️
go/arrow/csv/common.go	75% <77.77%> (+0.53%)	⬆️
cpp/src/arrow/compute/kernel.h	62.63% <0%> (-26.05%)	⬇️
cpp/src/arrow/visitor.h	50% <0%> (-16.67%)	⬇️
cpp/src/arrow/util/decimal.h	85.71% <0%> (-14.29%)	⬇️
cpp/src/arrow/compute/logical_type.cc	52.68% <0%> (-9.65%)	⬇️
cpp/src/arrow/compute/expression.cc	40.1% <0%> (-7.23%)	⬇️
cpp/src/arrow/visitor_inline.h	88.5% <0%> (-6.44%)	⬇️
cpp/src/gandiva/tree_expr_builder.cc	51.3% <0%> (-6.43%)	⬇️
... and 333 more

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[anson627]

@sbinet I update the PR as what we discussed, can you help to take a look?

[anson627]

@sbinet ping

[sbinet]

last nit-picks and then LGTM.