arrow

GH-44795: [C++] Use arrow::util::span on arrow::util::bitmap_builders_utilities instead of std::vector (#44796)

### Rationale for this change

`arrow::util::span` (a backport of C++20 `std::span`) is more generally applicable than `std::vector`, so any public API currently accepting a vector const-ref argument should instead accept a span argument.

### What changes are included in this PR?

`arrow::util::BytesToBits` accepts `arrow::util::span`  instead of `std::vector`

### Are these changes tested?

Yes, existing C++ tests via CI

### Are there any user-facing changes?

Yes,  from `Result<std::shared_ptr<Buffer>> BytesToBits(const std::vector<uint8_t>&, MemoryPool* pool)` to `Result<std::shared_ptr<Buffer>> BytesToBits(util::span<const uint8_t> bytes, MemoryPool* pool)`
* GitHub Issue: #44795

Authored-by: Raúl Cumplido <raulcumplido@gmail.com>
Signed-off-by: Antoine Pitrou <antoine@python.org>