chore(html): reuse helper in tests #3291

Job	Run time
Status check > Unit	1s
CI \| Unit	1s
CI \| Visual	1s
Lint styles / run (default)	2m 19s
Lint styles / run (bootstrap)	2m 12s
Compile themes / run	38s
Lint styles / run (material)	2m 25s
Lint styles / run (classic)	2m 18s
Lint scripts / run	55s
Lint styles / run (nouvelle)	52s
Render test pages / verify	14s
Lint styles / run (fluent)	52s
Render test pages / run	2m 5s
Status check > Lint scripts	1s
Status check > Lint styles	1s
Status check > A11y / prepare	1s
Create screenshots / run (default)	2m 22s
Create screenshots / run (bootstrap)	2m 31s
Create screenshots / run (material)	2m 23s
Create screenshots / run (classic)	2m 21s
Create screenshots / run (nouvelle)	1m 57s
Create screenshots / run (fluent)	2m 13s
Status check > A11y / run-checks (1)	2m 35s
Status check > A11y / run-checks (2)	2m 30s
Status check > A11y / run-checks (3)	2m 36s
Status check > A11y / run-checks (4)	3m 2s
Detect changes	30s
Status check > Visual	1s
	39m 57s

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