FixedSizeBinaryArray::try_from_sparse_iter failed when given all Nones

[jamescorbett]

Which issue does this PR close?

Closes ##1390.

Rationale for this change

Minimally invasive change to work around Options being unsized if None.

What changes are included in this PR?

Adding new function to get access to default size while maintaining original functionality.

Are there any user-facing changes?

One additional function try_from_sparse_iter_sized

[codecov-commenter]

Codecov Report

Merging #1508 (3a06bb7) into master (4c22315) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1508      +/-   ##
==========================================
- Coverage   82.73%   82.73%   -0.01%     
==========================================
  Files         188      188              
  Lines       54354    54356       +2     
==========================================
- Hits        44970    44969       -1     
- Misses       9384     9387       +3     

Impacted Files	Coverage Δ
arrow/src/array/array_binary.rs	92.64% <100.00%> (+0.02%)	⬆️
arrow/src/datatypes/field.rs	53.79% <0.00%> (-0.31%)	⬇️
parquet_derive/src/parquet_field.rs	65.98% <0.00%> (-0.23%)	⬇️
arrow/src/array/transform/mod.rs	86.35% <0.00%> (-0.12%)	⬇️

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[viirya]

Thanks for the fix. Can you also add a test for the fix?

[alamb]

I agree we should have a test prior to merging. Thanks @jamescorbett

[alamb]

We can probably just copy the test from #1390

[jamescorbett]

I will do sorry I have had work commitments.

[alamb]

I will do sorry I have had work commitments.

No worries -- sorry I didn't mean to pressure you. Thank you for the contribution; I can add the tests too if you don't have time

[alamb]

Marking as a draft to signify there is still some work to do. Please feel free to mark it ready for review when it is

[tustvold]

Closing this as #3054 has added support for this