Add coalesce inline-view filter benchmarks

[ClSlaid]

This is a benchmark-only companion patch for #9755.

It keeps the functional changes out of this PR and only adds benchmark coverage in arrow/benches/coalesce_kernels.rs so the coalesce inline-view filter work can be tested independently.

Benchmark coverage included:

• filter and take coalesce benchmarks
• primitive schemas
• single-column Utf8View and BinaryView
• mixed primitive + Utf8View and primitive + BinaryView schemas
• filter cases for short inline strings with max_string_len=8
• filter/take cases for longer view strings, including max_string_len=20, 30, and 128 depending on scenario

Coverage note:

• The filter benchmarks cover the main short-inline path targeted by arrow-select: Optimize BatchCoalescer::push_batch_with_filter for low selectivity filters and inlined Utf8View/BinaryView #9755 for both Utf8View and BinaryView.
• The take benchmarks cover Utf8View/BinaryView and mixed schemas, but do not add max_string_len=8 take variants. This patch keeps the benchmark changes aligned with the benchmark patch currently carried by arrow-select: Optimize BatchCoalescer::push_batch_with_filter for low selectivity filters and inlined Utf8View/BinaryView #9755.

Validation:

cargo fmt --package arrow
cargo bench --bench coalesce_kernels -- --list
git diff --check

[ClSlaid]

@alamb The separated benchmark from #9755 is here, PTAL.

[alamb]

Thank you @ClSlaid