Add walltime support for vitest plugin

[GuillaumeLagrange]

Code is functional barring one issue: timing sleep benchmarks have some very low outliers min value (microseconds when waiting multiple miliseconds)

This appear to be the case when running vitest benches with the default runner, so not sure how we should behave here
Reproduced

• locally on my machine with vitest v1.2.2 (current dev dependency) and 3.2.4 (latest)
• in ci with vitest v1.2.2

[codspeed-hq]

CodSpeed WallTime Performance Report

Merging #49 will degrade performances by 14.29%

_{Comparing cod-241-vitest-nodejs-support-for-the-walltime-executor (c9d2169) with cod-1066-tinybench-nodejs-support-for-the-walltime-executor (bfb95e2)}

Summary

❌ 1 regressions
✅ 26 untouched benchmarks
🆕 17 new benchmarks

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

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
🆕	fibo 30	N/A	109.5 ms	N/A
❌	switch 2	144 ns	168 ns	-14.29%
🆕	fibo 10	N/A	8.1 µs	N/A
🆕	fibo 15	N/A	78.3 µs	N/A
🆕	long body	N/A	235.7 µs	N/A
🆕	short body	N/A	24.9 µs	N/A
🆕	end	N/A	57.3 µs	N/A
🆕	long body	N/A	240 µs	N/A
🆕	short body	N/A	25.2 µs	N/A
🆕	short body	N/A	23.8 µs	N/A
🆕	long body	N/A	240.8 µs	N/A
🆕	short body	N/A	23.5 µs	N/A
🆕	long body	N/A	239.7 µs	N/A
🆕	short body	N/A	23.5 µs	N/A
🆕	short body	N/A	23.8 µs	N/A
🆕	wait 1ms	N/A	1 ms	N/A
🆕	wait 1sec	N/A	1 s	N/A
🆕	wait 500ms	N/A	500 ms	N/A

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #49 will degrade performances by 66.79%

_{Comparing cod-241-vitest-nodejs-support-for-the-walltime-executor (c9d2169) with cod-1066-tinybench-nodejs-support-for-the-walltime-executor (bfb95e2)}

Summary

⚡ 2 improvements
❌ 2 (👁 2) regressions
✅ 71 untouched benchmarks
🆕 7 new benchmarks
⁉️ 10 (👁 10) dropped benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	test_iterative_fibo_100	465.2 µs	282.1 µs	+64.87%
👁	fibo 10	14.9 µs	N/A	N/A
🆕	fibo 30	N/A	175 ms	N/A
👁	short body 3	63.6 µs	191.6 µs	-66.79%
👁	wait 1sec	12.3 ms	23 ms	-46.42%
⚡	wait 500ms	12.3 ms	10.8 ms	+13.31%
👁	end	123.5 µs	N/A	N/A
👁	one	108.6 µs	N/A	N/A
👁	two	108.7 µs	N/A	N/A
🆕	end	N/A	207.9 µs	N/A
🆕	one	N/A	228.2 µs	N/A
🆕	two	N/A	200.5 µs	N/A
👁	one	133 µs	N/A	N/A
👁	five	143.5 µs	N/A	N/A
👁	seven	141.2 µs	N/A	N/A
👁	three	141.4 µs	N/A	N/A
👁	two	125 µs	N/A	N/A
👁	one	325.6 µs	N/A	N/A
🆕	wait 1ms	N/A	24.3 µs	N/A
🆕	wait 1sec	N/A	23 ms	N/A
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.