expose shrink_to_fit to mutable arrays

[ritchie46]

This PR proposes to expose shrink_to_fit on the mutable arrays. The MutableBuffer already implements this, but its impossible to call with mutable array API as the internal buffers are private.

The same could be done for MutableBitmap.

[codecov]

Codecov Report

Merging #467 (1533023) into main (a15044a) will decrease coverage by 0.17%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #467      +/-   ##
==========================================
- Coverage   80.33%   80.16%   -0.18%     
==========================================
  Files         374      374              
  Lines       22919    22969      +50     
==========================================
+ Hits        18413    18414       +1     
- Misses       4506     4555      +49     

Impacted Files	Coverage Δ
src/array/binary/mutable.rs	61.11% <0.00%> (-2.24%)	⬇️
src/array/boolean/mutable.rs	82.68% <0.00%> (-2.87%)	⬇️
src/array/dictionary/mutable.rs	70.76% <0.00%> (-5.90%)	⬇️
src/array/fixed_size_binary/mutable.rs	67.03% <0.00%> (-4.74%)	⬇️
src/array/fixed_size_list/mutable.rs	48.52% <0.00%> (-4.70%)	⬇️
src/array/list/mutable.rs	66.33% <0.00%> (-4.94%)	⬇️
src/array/mod.rs	54.62% <ø> (ø)
src/array/primitive/mutable.rs	83.79% <0.00%> (-2.40%)	⬇️
src/array/utf8/mutable.rs	85.25% <0.00%> (-2.45%)	⬇️
src/io/avro/read/schema.rs	42.52% <0.00%> (+1.14%)	⬆️

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[jorgecarleitao]

Yeap, makes a lot of sense.

[jorgecarleitao]

I can take care of the MutableBitmap and we can then rebase on top of that.

[jorgecarleitao]

Done in #468

[ritchie46]

I can take care of the MutableBitmap and we can then rebase on top of that.

Great, once #468 is in main, I will do the rebase and add the MutableBitmap shrinking as well.

[ritchie46]

Good to go!

[jorgecarleitao]

Looks great! Thanks a lot, @ritchie46 ! We are missing one buffer xD