feat(headless): remove visitorId

[louis-bompart]

https://coveord.atlassian.net/browse/KIT-3623

The visitorId is deprecated on all SearchAPIs endpoints (unrelated to EventProtocol), as the clientId replaces it.
@coveo/service-core, I did it on your APIs, but could you confirm that the clientId is being correctly used and passed along?

[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	236.3	236.1	-0.1
commerce	339.1	338.9	-0.1
search	411.5	411.2	-0.1
insight	399.3	398.9	-0.1
recommendation	248.5	248.3	-0.1
ssr	405.5	405.2	-0.1
ssr-commerce	351.4	351.1	-0.1

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

[dmgauthier]

@mmitiche @pathiery I do not see anything wrong in the code here. But I know not about the clientID and if we pass it properly.