fix: migrate from shell-words to shlex for shell parsing

[mkroening]

This PR migrates our shell parsing logic for kernel arguments from shell-words to shlex.
Both crates are hugely popular, but shlex is a bit more essential to the ecosystem.
This aligns the parsing crate with the quoting crate introduced in #2540.

I don't remember why I chose shell-words in #357.

This does allow avoiding allocating a vector, which is nice, but not that important.

[github-actions]

Benchmark Results

Details

Benchmark	Current: 3f89033	Previous: 496a427	Performance Ratio
startup_benchmark Build Time	78.85 s	80.41 s	0.98 ❗
startup_benchmark File Size	0.80 MB	0.80 MB	1.00 ❗
Startup Time - 1 core	0.75 s (±0.01 s)	0.73 s (±0.02 s)	1.03
Startup Time - 2 cores	0.73 s (±0.02 s)	0.73 s (±0.02 s)	0.99
Startup Time - 4 cores	0.76 s (±0.02 s)	0.74 s (±0.02 s)	1.02
multithreaded_benchmark Build Time	77.28 s	81.45 s	0.95 ❗
multithreaded_benchmark File Size	0.89 MB	0.86 MB	1.03 ❗
Multithreaded Pi Efficiency - 2 Threads	88.75 % (±5.93 %)	89.19 % (±7.29 %)	1.00
Multithreaded Pi Efficiency - 4 Threads	44.51 % (±2.19 %)	43.23 % (±2.22 %)	1.03
Multithreaded Pi Efficiency - 8 Threads	25.61 % (±1.43 %)	25.70 % (±1.35 %)	1.00
micro_benchmarks Build Time	74.81 s	80.50 s	0.93 ❗
micro_benchmarks File Size	0.89 MB	0.86 MB	1.03 ❗
Scheduling time - 1 thread	63.61 ticks (±1.38 ticks)	61.77 ticks (±3.53 ticks)	1.03
Scheduling time - 2 threads	34.87 ticks (±3.97 ticks)	34.80 ticks (±4.41 ticks)	1.00
Micro - Time for syscall (getpid)	3.38 ticks (±0.52 ticks)	3.24 ticks (±0.53 ticks)	1.04
Memcpy speed - (built_in) block size 4096	83130.68 MByte/s (±57506.70 MByte/s)	82518.62 MByte/s (±57031.72 MByte/s)	1.01
Memcpy speed - (built_in) block size 1048576	30669.76 MByte/s (±24694.25 MByte/s)	30748.73 MByte/s (±24797.64 MByte/s)	1.00
Memcpy speed - (built_in) block size 16777216	29336.37 MByte/s (±24080.97 MByte/s)	26790.22 MByte/s (±22121.79 MByte/s)	1.10
Memset speed - (built_in) block size 4096	83361.41 MByte/s (±57689.01 MByte/s)	82944.82 MByte/s (±57257.89 MByte/s)	1.01
Memset speed - (built_in) block size 1048576	31426.03 MByte/s (±25142.74 MByte/s)	31513.05 MByte/s (±25249.82 MByte/s)	1.00
Memset speed - (built_in) block size 16777216	30116.26 MByte/s (±24541.13 MByte/s)	27578.05 MByte/s (±22634.55 MByte/s)	1.09
Memcpy speed - (rust) block size 4096	76540.57 MByte/s (±53309.69 MByte/s)	77062.45 MByte/s (±53546.55 MByte/s)	0.99
Memcpy speed - (rust) block size 1048576	30628.81 MByte/s (±24701.58 MByte/s)	30445.41 MByte/s (±24660.75 MByte/s)	1.01
Memcpy speed - (rust) block size 16777216	29545.01 MByte/s (±24263.76 MByte/s)	27553.35 MByte/s (±22787.50 MByte/s)	1.07
Memset speed - (rust) block size 4096	76952.16 MByte/s (±53607.34 MByte/s)	77521.43 MByte/s (±53878.01 MByte/s)	0.99
Memset speed - (rust) block size 1048576	31380.05 MByte/s (±25140.74 MByte/s)	31217.22 MByte/s (±25122.56 MByte/s)	1.01
Memset speed - (rust) block size 16777216	30297.36 MByte/s (±24693.55 MByte/s)	28357.26 MByte/s (±23299.40 MByte/s)	1.07
alloc_benchmarks Build Time	75.66 s	75.20 s	1.01 ❗
alloc_benchmarks File Size	0.87 MB	0.87 MB	1.00 ❗
Allocations - Allocation success	91.31 %	91.31 %	1
Allocations - Deallocation success	100.00 %	100.00 %	1
Allocations - Pre-fail Allocations	61.44 %	61.44 %	1
Allocations - Average Allocation time	2842.50 Ticks (±893.21 Ticks)	5199.04 Ticks (±177.30 Ticks)	0.55 ❗
Allocations - Average Allocation time (no fail)	3866.64 Ticks (±800.68 Ticks)	5969.39 Ticks (±137.74 Ticks)	0.65 ❗
Allocations - Average Deallocation time	808.46 Ticks (±152.44 Ticks)	1612.60 Ticks (±268.46 Ticks)	0.50 ❗
mutex_benchmark Build Time	82.78 s	76.02 s	1.09 ❗
mutex_benchmark File Size	0.89 MB	0.86 MB	1.03 ❗
Mutex Stress Test Average Time per Iteration - 1 Threads	11.98 ns (±0.37 ns)	11.94 ns (±0.37 ns)	1.00
Mutex Stress Test Average Time per Iteration - 2 Threads	40.24 ns (±2.01 ns)	40.06 ns (±2.30 ns)	1.00

This comment was automatically generated by workflow using github-action-benchmark.