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GH-42065: [C++] Support list-views on list_slice (#42067)

### Rationale for this change

Getting closeness to completeness of list-view support in the official Arrow C++ compute functions.

### What changes are included in this PR?

 - Addition of benchmarks for `list_slice`
 - Extending the tests to exercise the list-view kernels as well
 - Refactoring of existing list_slice kernels for clarity, efficiency, and binary size
 - Main binary-size reductions coming from not generating code for Input-x-Output that will never actually run

### Are these changes tested?

By existing and new tests.

### Are there any user-facing changes?

list_slice now supports list-view typed inputs.
* GitHub Issue: #42065

Lead-authored-by: Felipe Oliveira Carvalho <felipekde@gmail.com>
Co-authored-by: Antoine Pitrou <antoine@python.org>
Signed-off-by: Antoine Pitrou <antoine@python.org>