Allow test compilation to be disabled

[ewanwm]

Previously cmake breaks with option NT_COMPILE_TESTS=OFF

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Bencher Report

Branch	fix/allow-disable-testing
Testbed	ubuntu-latest

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Benchmark	Latency	nanoseconds (ns)
Const Density Oscillations/1024/1024	📈 view plot ⚠️ NO THRESHOLD	1,913,929,566.00 ns
Const Density Oscillations/1024/1024_cv	📈 view plot ⚠️ NO THRESHOLD	0.00 ns
Const Density Oscillations/1024/1024_mean	📈 view plot ⚠️ NO THRESHOLD	1,914,456,746.94 ns
Const Density Oscillations/1024/1024_median	📈 view plot ⚠️ NO THRESHOLD	1,914,246,176.00 ns
Const Density Oscillations/1024/1024_stddev	📈 view plot ⚠️ NO THRESHOLD	3,840,840.27 ns
DP Propagator Const Density Oscillations/1024/1024	📈 view plot ⚠️ NO THRESHOLD	846,945,534.00 ns
DP Propagator Const Density Oscillations/1024/1024_cv	📈 view plot ⚠️ NO THRESHOLD	0.00 ns
DP Propagator Const Density Oscillations/1024/1024_mean	📈 view plot ⚠️ NO THRESHOLD	844,760,597.81 ns
DP Propagator Const Density Oscillations/1024/1024_median	📈 view plot ⚠️ NO THRESHOLD	844,002,717.50 ns
DP Propagator Const Density Oscillations/1024/1024_stddev	📈 view plot ⚠️ NO THRESHOLD	2,510,045.04 ns
Vacuum Oscillations/1024/1024	📈 view plot ⚠️ NO THRESHOLD	408,945,522.00 ns
Vacuum Oscillations/1024/1024_cv	📈 view plot ⚠️ NO THRESHOLD	0.01 ns
Vacuum Oscillations/1024/1024_mean	📈 view plot ⚠️ NO THRESHOLD	408,254,285.47 ns
Vacuum Oscillations/1024/1024_median	📈 view plot ⚠️ NO THRESHOLD	407,245,925.75 ns
Vacuum Oscillations/1024/1024_stddev	📈 view plot ⚠️ NO THRESHOLD	5,169,541.54 ns

🐰 View full continuous benchmarking report in Bencher