Add walltime support for vitest plugin #520

Job	Run time
check	1m 58s
List examples	4s
with-typescript-simple-cjs on Node 18	1m 56s
with-typescript-cjs on Node 18	1m 55s
with-typescript-simple-cjs on Node 20.5.1	2m 33s
with-javascript-esm on Node 18	1m 52s
with-typescript-esm on Node 20.5.1	2m 9s
with-typescript-simple-esm on Node 20.5.1	2m 3s
with-typescript-simple-esm on Node 18	2m 17s
with-typescript-esm on Node 18	2m 16s
with-javascript-esm on Node 20.5.1	1m 59s
with-typescript-cjs on Node 20.5.1	2m 48s
	23m 50s

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