test: add not-yet-passing tests for set -u and set -e

[reubeno]

Fill out more tests for set options. Mark ones not yet passing as known failures.

[github-actions]

Test Results

    3 files     23 suites   6m 9s ⏱️
1 080 tests 1 080 ✅ 0 💤 0 ❌
3 220 runs  3 220 ✅ 0 💤 0 ❌

Results for commit 1b7289c.

[github-actions]

Performance Benchmark Report

Benchmark name	Baseline (μs)	Test/PR (μs)	Delta (μs)	Delta %
clone_shell_object	17.67 μs	17.74 μs	0.06 μs	🟠 +0.36%
eval_arithmetic	0.15 μs	0.15 μs	0.00 μs	⚪ Unchanged
expand_one_string	2.00 μs	1.98 μs	-0.02 μs	⚪ Unchanged
for_loop	22.45 μs	22.13 μs	-0.32 μs	🟢 -1.44%
function_call	2.58 μs	2.60 μs	0.02 μs	⚪ Unchanged
instantiate_shell	58.68 μs	58.94 μs	0.26 μs	⚪ Unchanged
instantiate_shell_with_init_scripts	23991.30 μs	24187.90 μs	196.60 μs	⚪ Unchanged
parse_bash_completion	2034.24 μs	2056.23 μs	21.99 μs	🟠 +1.08%
parse_sample_script	1.93 μs	1.91 μs	-0.02 μs	🟢 -1.14%
run_echo_builtin_command	15.78 μs	15.97 μs	0.19 μs	⚪ Unchanged
run_one_external_command	2503.46 μs	5792.45 μs	3288.99 μs	🟠 +131.38%
tokenize_sample_script	3.53 μs	3.54 μs	0.01 μs	⚪ Unchanged

Code Coverage Report: Only Changed Files listed

Package	Base Coverage	New Coverage	Difference
brush-builtins/src/export.rs	🟠 71.95%	🟠 73.17%	🟢 1.22%
brush-core/src/extendedtests.rs	🟠 68.45%	🟠 68.7%	🟢 0.25%
brush-core/src/jobs.rs	🔴 37.16%	🔴 47.71%	🟢 10.55%
brush-core/src/tests.rs	🟠 57.89%	🟠 68.42%	🟢 10.53%
brush-core/src/variables.rs	🟢 88.69%	🟢 88.87%	🟢 0.18%
brush-parser/src/ast.rs	🔴 31.66%	🔴 34.7%	🟢 3.04%
brush-parser/src/test_command.rs	🔴 33.33%	🔴 40.58%	🟢 7.25%
Overall Coverage	🟢 72.94%	🟢 73.27%	🟢 0.33%

Minimum allowed coverage is 70%, this run produced 73.27%

Test Summary: bash-completion test suite

Outcome	Count	Percentage
✅ Pass	1345	63.77
❗️ Error	215	10.19
❌ Fail	180	8.53
⏩ Skip	354	16.79
❎ Expected Fail	14	0.66
✔️ Unexpected Pass	1	0.05
📊 Total	2109	100.00