fix(atomic): actually use alt field value

[louis-bompart]

https://coveord.atlassian.net/browse/KIT-3747

[github-actions]

Pull Request Report

PR Title

✅ Title follows the conventional commit spec.

Live demo links

• Storybook

• Playwright report

Bundle Size

File	Old (kb)	New (kb)	Change (%)
case-assist	241.3	241.3	0
commerce	346	346	0
search	412.9	412.9	0
insight	403.6	403.6	0
recommendation	253.5	253.5	0
ssr	406.4	406.4	0
ssr-commerce	358.2	358.2	0

SSR Progress

Use case	SSR (#)	CSR (#)	Progress (%)
search	39	44	89
recommendation	0	4	0
case-assist	0	6	0
insight	0	27	0
commerce	0	15	0

Detailed logs

search : buildInteractiveResult
search : buildInteractiveInstantResult
search : buildInteractiveRecentResult
search : buildInteractiveCitation
search : buildGeneratedAnswer
recommendation : missing SSR support
case-assist : missing SSR support
insight : missing SSR support
commerce : missing SSR support