chore: Update layouts/Header tests to Vitest #4607

Job	Run time
Install deps	16s
Build Self Hosted Image / Build Self Hosted App	4m 44s
Run Lint	18s
Run Prettier Check	34s
Run Fossa	31s
Generate runner indexes CRACO	4s
Generate runner indexes Vitest	4s
Run storybook	1m 42s
Run Type Checker	49s
Upload Bundle Stats - Production	2m 0s
Upload Bundle Stats - Staging	1m 57s
Codecov Startup / Codecov Startup	19s
Test Runner #0 - Vitest	1m 17s
Test Runner #0 - CRACO	1m 44s
Test Runner #1 - CRACO	1m 37s
Test Runner #2 - CRACO	1m 48s
Test Runner #3 - CRACO	1m 52s
Test Runner #4 - CRACO	1m 51s
Test Runner #5 - CRACO	1m 33s
Test Runner #6 - CRACO	1m 36s
Test Runner #7 - CRACO	1m 38s
Test Runner #8 - CRACO	1m 17s
Build App	1m 47s
Build Self Hosted Image / Push Self Hosted Release Image	0s
Build Self Hosted Image / Push Self Hosted Image	0s
Push Self Hosted Image	0s
	31m 18s

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