Instant Search: allow filtering the markup of the search results

It would be nice if one were able to customize some of the markup of the Instant Search result page.

> I'd like to add data-google-interstitial="false" to them to avoid triggering Google’s Interstitial ads when clicking these links. Can these link elements be somehow filtered? As a workaround, I thought about adding that attribute programmatically from a JS script, but I’m not sure if it would to the trick…
-- p1712141195010369-slack-CDLH4C1UZ

References:

- https://github.com/Automattic/jetpack/blob/b550c1120720533d18cf49360060547d9725752d/projects/packages/search/src/instant-search/components/search-result-expanded.jsx#L65-L69
- https://github.com/Automattic/jetpack/blob/da40feddf6cf85ab445389a51f2408e2f42c4d0d/projects/packages/search/src/instant-search/components/search-result-product.jsx#L61-L65
- https://github.com/Automattic/jetpack/blob/5e09479e047632668cb7f97b7078bbd468160367/projects/packages/search/src/instant-search/components/search-result-minimal.jsx#L115-L119

Start with the three referenced components: projects/packages/search/src/instant-search/components/search-result-expanded.jsx, search-result-product.jsx, and search-result-minimal.jsx, focusing on the cited link elements. Trace how those result links are rendered and determine a suitable filtering customization; done means the requested data-google-interstitial="false" attribute can be applied to the relevant links.

Written by the indexing model from the issue text.