Revert "Fixed ffi of sliced arrays (#540)"

[jorgecarleitao]

This reverts commit e6b6c83.

It introduced a regression in other parts of the code that is worse than fixing the FFI. Need to re-think it :P

[codecov]

Codecov Report

Merging #552 (24851fa) into main (4491954) will decrease coverage by 0.26%.
The diff coverage is 46.76%.

@@            Coverage Diff             @@
##             main     #552      +/-   ##
==========================================
- Coverage   79.38%   79.11%   -0.27%     
==========================================
  Files         384      382       -2     
  Lines       24354    24389      +35     
==========================================
- Hits        19333    19296      -37     
- Misses       5021     5093      +72     

Impacted Files	Coverage Δ
src/array/boolean/ffi.rs	0.00% <0.00%> (ø)
src/array/ffi.rs	65.00% <ø> (-5.00%)	⬇️
src/array/map/ffi.rs	0.00% <0.00%> (ø)
src/array/map/mod.rs	40.00% <0.00%> (-0.68%)	⬇️
src/array/null.rs	39.28% <0.00%> (-4.72%)	⬇️
src/array/struct_.rs	43.20% <0.00%> (-19.95%)	⬇️
src/array/union/ffi.rs	0.00% <0.00%> (ø)
src/array/fixed_size_binary/mod.rs	50.00% <14.28%> (-3.74%)	⬇️
src/array/fixed_size_list/mod.rs	59.70% <14.28%> (-5.30%)	⬇️
src/array/dictionary/mod.rs	46.66% <50.00%> (-10.23%)	⬇️
... and 27 more

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