docs(javascript): Document dataCollection option

[s1gr1d]

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Merge after this is released: getsentry/sentry-javascript#21277

closesgetsentry/sentry-javascript#20939
closesgetsentry/sentry-javascript#21271

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[cleptric]

Should also add this to https://docs.sentry.io/platforms/javascript/data-management/

[inventarSarah]

Content looks good to me 👍

Will updating the other pages that mention sendDefaultPi be covered in a separate PR?
Let me know if I can support you with that.

[s1gr1d]

I updated the "Data Collected" page as well now: https://sentry-docs-git-sig-datacollection-option.sentry.dev/platforms/javascript/guides/nextjs/data-management/data-collected/

I also changed all code snippets that contained sendDefaultPii - so users don't get a deprecation warning when they paste the snippet.

[coolguyzone]

Looks good! 🏄‍♂️

[inventarSarah]

👏Looks great! Thanks for updating all these files :)

[chargome]

One minor thing, otherwise good to go!