Changed methods to slice arrays

[jorgecarleitao]

Currently slicing arrays require cloning. This PR removes that requirement.

Backward incompatible changes

• slice(&self, offset: usize, length: usize) -> Self in all arrays and trait Array changed signature to slice(&mut self, offset: usize, length: usize)
• New function sliced(self, offset: usize, length: usize) -> Self was added to all arrays
• New function sliced(&self, offset: usize, length: usize) -> Box<dyn Array> was added to Array trait

With this new API:

• slice an &mut array in place via array.slice(...)
• slice an array via let array = array.sliced(...);
• slice an &array by cloning it and using array

[codecov]

Codecov Report

Base: 83.49% // Head: 83.44% // Decreases project coverage by -0.05% ⚠️

Coverage data is based on head (359c170) compared to base (7be484e).
Patch coverage: 82.38% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1396      +/-   ##
==========================================
- Coverage   83.49%   83.44%   -0.05%     
==========================================
  Files         373      373              
  Lines       40758    40721      -37     
==========================================
- Hits        34029    33980      -49     
- Misses       6729     6741      +12     

Impacted Files	Coverage Δ
src/array/union/ffi.rs	0.00% <0.00%> (ø)
src/array/null.rs	54.66% <14.28%> (+2.10%)	⬆️
src/offset.rs	83.21% <20.00%> (-2.40%)	⬇️
src/array/map/mod.rs	54.28% <41.66%> (-6.94%)	⬇️
src/array/union/mod.rs	82.57% <50.00%> (-2.05%)	⬇️
src/array/equal/struct_.rs	70.73% <66.66%> (+24.39%)	⬆️
src/array/fixed_size_binary/mod.rs	85.95% <81.81%> (+0.92%)	⬆️
src/buffer/immutable.rs	84.61% <83.33%> (-5.63%)	⬇️
src/array/fixed_size_list/mod.rs	84.82% <84.61%> (-0.89%)	⬇️
src/bitmap/immutable.rs	84.88% <88.88%> (-1.18%)	⬇️
... and 34 more

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