fix: correct pattern removal expansions on arrays

[reubeno]

This was missed when the other expansions were retrofitted to support arrays; uses existing transform_expansion helper to simplify the work of iteratively transforming all elements of the array.

[github-actions]

Test Results

  2 files    9 suites   1m 5s ⏱️
496 tests 496 ✅ 0 💤 0 ❌
981 runs  981 ✅ 0 💤 0 ❌

Results for commit 08d0360.

[github-actions]

Performance Benchmark Report

Benchmark name	Baseline (μs)	Test/PR (μs)	Delta (μs)	Delta %
expand_one_string	3.42 μs	3.42 μs	0.00 μs	⚪ Unchanged
instantiate_shell	59.78 μs	60.96 μs	1.17 μs	🟠 +1.96%
instantiate_shell_with_init_scripts	30315.31 μs	30893.21 μs	577.90 μs	⚪ Unchanged
parse_bash_completion	2770.09 μs	2798.12 μs	28.03 μs	🟠 +1.01%
parse_sample_script	4.27 μs	4.28 μs	0.01 μs	⚪ Unchanged
run_echo_builtin_command	89.03 μs	91.57 μs	2.54 μs	🟠 +2.85%
run_one_builtin_command	108.40 μs	110.63 μs	2.23 μs	⚪ Unchanged
run_one_external_command	1926.17 μs	2022.25 μs	96.08 μs	🟠 +4.99%
run_one_external_command_directly	1006.22 μs	1007.45 μs	1.23 μs	⚪ Unchanged

Code Coverage Report: Only Changed Files listed

Package	Base Coverage	New Coverage	Difference
brush-core/src/expansion.rs	🟢 96.03%	🟢 96%	🔴 -0.03%
brush-core/src/shell.rs	🟢 83.5%	🟢 83.64%	🟢 0.14%
brush-core/src/sys/unix/signal.rs	🟢 75.41%	🟠 72.13%	🔴 -3.28%
Overall Coverage	🟢 76.5%	🟢 76.48%	🔴 -0.02%

Minimum allowed coverage is 70%, this run produced 76.48%