test(array): gate NEON take bounds test to aarch64

`take_small_byte_table_rejects_out_of_bounds_index` asserts the NEON small-table
bounds-check message, but the table path only exists on little-endian AArch64.
On other targets `take_values` falls through to the AVX2 or scalar path, whose
panic messages differ, so the test failed on the linux-musl runner (no AVX2:
the scalar path panics with the plain slice message).

Gate the test on the same cfg as the module. `take_small_byte_table` stays
unconditional so every target keeps checking the results.

Signed-off-by: "Joe Isaacs" <joe.isaacs@live.co.uk>

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013YND3Jq47YtL15ob3GEsVY

Author: joseph-isaacs

vortex-array/src/arrays/fixed_width/take/tests.rs

@@ -52,6 +52,9 @@ fn take_small_byte_table() {
     );
 }
 
+// The bounds-check message is specific to the NEON table path; other targets reach a different
+// fallback with its own message.
+#[cfg(all(target_arch = "aarch64", target_endian = "little"))]
 #[test]
 #[should_panic(expected = "take index")]
 fn take_small_byte_table_rejects_out_of_bounds_index() {