chore: Update layouts/Header tests to Vitest #4595

Job	Run time
Install deps	16s
Build Self Hosted Image / Build Self Hosted App	4m 49s
Run Lint	26s
Run Type Checker	45s
Run Prettier Check	32s
Generate runner indexes CRACO	4s
Generate runner indexes Vitest	4s
Run Fossa	14s
Run storybook	1m 33s
Upload Bundle Stats - Staging	2m 1s
Upload Bundle Stats - Production	2m 3s
Codecov Startup / Codecov Startup	16s
Test Runner #0 - Vitest	1m 7s
Test Runner #0 - CRACO	1m 45s
Test Runner #1 - CRACO	1m 42s
Test Runner #2 - CRACO	1m 49s
Test Runner #3 - CRACO	1m 52s
Test Runner #4 - CRACO	2m 1s
Test Runner #5 - CRACO	1m 29s
Test Runner #6 - CRACO	1m 45s
Test Runner #7 - CRACO	1m 35s
Test Runner #8 - CRACO	1m 18s
Build App	1m 52s
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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