test(arrow-select): add take_bytes coverage for sliced values and nullable offset overflow (#10053)

# Which issue does this PR close?

- test-only follow-up to #9625.

# Rationale for this change

While reviewing #9625 (which rewrites `take_bytes`), I noticed two paths
in the existing test suite were not directly exercised:

1. **Taking from a *sliced* byte array**
2. **The `OffsetOverflowError` on the nullable path** —
`test_take_bytes_offset_overflow` only uses non-null indices, so it only
covers the no-null fast path.

I can write tests which pass against `main` today and show the existing
behavior give #9625 (and future `take_bytes` changes) better coverage of
the byte-copy and overflow paths.

# What changes are included in this PR?

Two new tests in `arrow-select/src/take.rs`:

# Are these changes tested?

These changes *are* tests. They pass on the current implementation.

# Are there any user-facing changes?

None.

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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: alamb