ci: build musl targets for cargo-codspeed binary artifacts

[GuillaumeLagrange]

Fixes #79

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #80 will not alter performance

_{Comparing cod-594-codspeed-28-hangs-or-kills-in-the-ci-runner (795aa74) with main (dbf688b)}

Summary

✅ 152 untouched benchmarks

[codspeed-hq]

CodSpeed Walltime Performance Report

Merging #80 will degrade performances by 49.92%

_{Comparing cod-594-codspeed-28-hangs-or-kills-in-the-ci-runner (795aa74) with main (dbf688b)}

Summary

⚡ 9 improvements
❌ 3 regressions
✅ 86 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	recursive_memoized[BTreeMap<u64, u64>, 20]	1.7 µs	3.5 µs	-49.83%
⚡	generate_parentheses[4]	7.1 µs	6.9 µs	+3.15%
⚡	generate_parentheses[5]	23.1 µs	21.8 µs	+6.01%
⚡	generate_parentheses[6]	73 µs	68 µs	+7.45%
⚡	n_queens_solver[4]	1.7 µs	1.6 µs	+4.48%
⚡	permutations[7]	843 µs	789.3 µs	+6.8%
⚡	generate_gray_code[3]	3.7 µs	1.8 µs	×2.1
⚡	generate_gray_code[4]	3.7 µs	3.6 µs	+4.37%
❌	generate_gray_code[5]	1.9 µs	3.7 µs	-49.68%
⚡	instant	5.4 µs	5.2 µs	+3.94%
❌	system_time	3.4 µs	6.8 µs	-49.92%
⚡	tsc (aarch64)	1.1 µs	1.1 µs	+4.4%