feat: support codegen for expressions involving arrays of symbolics

[AayushSabharwal]

No description provided.

[github-actions]

Benchmark Results

	master	a6929f4...	master/a6929f457356ad...
overhead/acrule/a+2	0.755 ± 0.018 μs	0.729 ± 0.022 μs	1.04
overhead/acrule/a+2+b	0.734 ± 0.018 μs	0.707 ± 0.022 μs	1.04
overhead/acrule/a+b	0.258 ± 0.0098 μs	0.259 ± 0.009 μs	0.996
overhead/acrule/noop:Int	25.9 ± 0.92 ns	25.9 ± 0.92 ns	1
overhead/acrule/noop:Sym	0.0367 ± 0.0053 μs	0.0368 ± 0.0059 μs	0.999
overhead/rule/noop:Int	0.0446 ± 0.00052 μs	0.0443 ± 0.0012 μs	1.01
overhead/rule/noop:Sym	0.055 ± 0.0025 μs	0.0551 ± 0.0025 μs	0.999
overhead/rule/noop:Term	0.0551 ± 0.0024 μs	0.0549 ± 0.0026 μs	1
overhead/ruleset/noop:Int	0.13 ± 0.0031 μs	0.13 ± 0.0027 μs	0.996
overhead/ruleset/noop:Sym	0.158 ± 0.0051 μs	0.156 ± 0.0047 μs	1.01
overhead/ruleset/noop:Term	3.2 ± 0.15 μs	3.23 ± 0.15 μs	0.991
overhead/simplify/noop:Int	0.141 ± 0.0022 μs	0.141 ± 0.0043 μs	0.999
overhead/simplify/noop:Sym	0.161 ± 0.005 μs	0.164 ± 0.0024 μs	0.978
overhead/simplify/noop:Term	0.0361 ± 0.0019 ms	0.0384 ± 0.0022 ms	0.941
overhead/simplify/randterm (+, *):serial	0.0878 ± 0.00079 s	0.0897 ± 0.001 s	0.979
overhead/simplify/randterm (+, *):thread	0.0512 ± 0.032 s	0.0519 ± 0.036 s	0.987
overhead/simplify/randterm (/, *):serial	0.21 ± 0.0066 ms	0.221 ± 0.0077 ms	0.95
overhead/simplify/randterm (/, *):thread	0.238 ± 0.0079 ms	0.25 ± 0.009 ms	0.951
overhead/substitute/a	0.0584 ± 0.0015 ms	0.0603 ± 0.0015 ms	0.97
overhead/substitute/a,b	0.0516 ± 0.0042 ms	0.0526 ± 0.0015 ms	0.98
overhead/substitute/a,b,c	16.9 ± 0.72 μs	16.9 ± 0.66 μs	0.999
polyform/easy_iszero	28.8 ± 2.1 μs	28.9 ± 2.1 μs	0.996
polyform/isone	2.79 ± 0.01 ns	2.79 ± 0.01 ns	1
polyform/iszero	1.11 ± 0.033 ms	1.13 ± 0.033 ms	0.98
polyform/simplify_fractions	1.63 ± 0.04 ms	1.63 ± 0.039 ms	0.997
time_to_load	4.48 ± 0.0084 s	4.5 ± 0.021 s	0.997

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).