Revive manylinux builds, and drop mimalloc

[ayazhafiz]

Builds development abq binaries on a succifiently-old glibc system,
suitable for dynamic linking of newer glibcs on EC2 and Github Actions.

Drops configuration of mimalloc as the global allocator. Instead, prefer the default system or libc allocator. By default, rustc
will defer to the system allocator.

[ayazhafiz]

@doxavore are you okay with these suffixes? Would you prefer something else?

[doxavore]

These seem as sensible to me as anything 🤷

[github-actions]

✅ Bigtest for 209ad18 (run)

Benchmarks:

• RSpec: 13.77% overhead
  • RSpec time: 17.79 seconds
  • ABQ time: 20.24 seconds
• RSpec parallel, 10 runs: max 16.13% overhead
  • min 7.59% overhead
  • standard deviation: 2.33%
• Jest: 6.19% overhead
  • Jest time: 20.708 seconds
  • ABQ time: 21.99 seconds

Fuzz result sizes:

• PASSED

[github-actions]

✅ Bigtest for 209ad18 (run)

Benchmarks:

• RSpec: 9.74% overhead
  • RSpec time: 17.77 seconds
  • ABQ time: 19.5 seconds
• RSpec parallel, 10 runs: max 16.32% overhead
  • min 6.36% overhead
  • standard deviation: 3.68%
• Jest: 5.22% overhead
  • Jest time: 20.37 seconds
  • ABQ time: 21.434 seconds

Fuzz result sizes:

• PASSED

[github-actions]

✅ Bigtest for e729c7a (run)

Benchmarks:

• RSpec: 14.63% overhead
  • RSpec time: 17.77 seconds
  • ABQ time: 20.37 seconds
• RSpec parallel, 10 runs: max 15.08% overhead
  • min 7.2% overhead
  • standard deviation: 2.26%
• Jest: 7.20% overhead
  • Jest time: 21.209 seconds
  • ABQ time: 22.736 seconds

Fuzz result sizes:

• PASSED

[doxavore]

These seem as sensible to me as anything 🤷