Add support for an external synchronous compiler to discrete and hybrid systems

[BenChung]

Checklist

• Appropriate tests were added
• Any code changes were done in a way that does not break public API
• All documentation related to code changes were updated
• The new code follows the
  contributor guidelines, in particular the SciML Style Guide and
  COLPRAC.
• Any new documentation only uses public API

Additional context

Add any other context about the problem here.

[github-actions]

Benchmark Results (Julia vlts)

Time benchmarks

	master	600d723...	master / 600d723...
ODEProblem	0.0803 ± 0.0068 s	0.0804 ± 0.0063 s	0.999 ± 0.11
init	0.061 ± 0.0014 ms	0.0638 ± 0.0018 ms	0.956 ± 0.035
large_parameter_init/ODEProblem	1.03 ± 0.008 s	1.05 ± 0.0026 s	0.985 ± 0.008
large_parameter_init/init	0.111 ± 0.0021 ms	0.111 ± 0.0025 ms	1 ± 0.03
mtkcompile	0.0342 ± 0.0014 s	0.0339 ± 0.0009 s	1.01 ± 0.048
time_to_load	4.83 ± 0.0098 s	4.83 ± 0.029 s	1 ± 0.0064

Memory benchmarks

	master	600d723...	master / 600d723...
ODEProblem	0.588 M allocs: 20 MB	0.587 M allocs: 19.9 MB	1
init	0.908 k allocs: 0.0479 MB	0.908 k allocs: 0.0479 MB	1
large_parameter_init/ODEProblem	4.31 M allocs: 0.167 GB	4.33 M allocs: 0.168 GB	0.994
large_parameter_init/init	1.75 k allocs: 0.0874 MB	1.75 k allocs: 0.0874 MB	1
mtkcompile	0.231 M allocs: 8.55 MB	0.235 M allocs: 8.69 MB	0.983
time_to_load	0.153 k allocs: 14.5 kB	0.153 k allocs: 14.5 kB	1

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	master	600d723...	master / 600d723...
ODEProblem	0.0918 ± 0.0052 s	0.0924 ± 0.0062 s	0.994 ± 0.088
init	0.058 ± 0.012 ms	0.0573 ± 0.012 ms	1.01 ± 0.3
large_parameter_init/ODEProblem	1.14 ± 0.027 s	1.14 ± 0.005 s	0.999 ± 0.024
large_parameter_init/init	0.101 ± 0.011 ms	0.101 ± 0.0099 ms	0.997 ± 0.15
mtkcompile	0.0377 ± 0.0018 s	0.0389 ± 0.0009 s	0.97 ± 0.052
time_to_load	5.29 ± 0.14 s	5.19 ± 0.062 s	1.02 ± 0.03

Memory benchmarks

	master	600d723...	master / 600d723...
ODEProblem	0.577 M allocs: 18.8 MB	0.578 M allocs: 18.7 MB	1
init	0.815 k allocs: 0.0318 MB	0.815 k allocs: 0.0318 MB	1
large_parameter_init/ODEProblem	4.41 M allocs: 0.16 GB	4.4 M allocs: 0.16 GB	1
large_parameter_init/init	1.66 k allocs: 0.0712 MB	1.66 k allocs: 0.0712 MB	1
mtkcompile	0.231 M allocs: 7.99 MB	0.235 M allocs: 8.13 MB	0.983
time_to_load	0.159 k allocs: 11.2 kB	0.159 k allocs: 11.2 kB	1