feat(web-vitals): Upgrade to web-vitals v1.1.2

[AbhiPrasad]

🚧 WIP 🏗️

Bumps web-vitals to v1.1.2. I'm pretty sure I'm closing this one in favour of a PR with cleaner README + commits, but wanted to get this one out so y'all can spend your weekend thinking about vitals :)))

These are scary changes so there is still a lot to do before we can make this ready to review. Also my first time touching this stuff so apologies if I'm missing something here.

• Port over the web-vitals tests. Def write some tests myself also
• Do some extensive testing on Sentry instance with multiple browsers
• Figure out if the bug fixes/breaking changes may result in large changes/discrepencies and how we can communicate that (either docs or heads up to support)
• Figure out the polyfill stuff (need some help with that)
• Figure out if we wanna support onBFCacheRestore: https://web.dev/bfcache/.

For more reference for the last 2, see: GoogleChrome/web-vitals#87

Also I might end up closing this PR and doing this upgrade later as v2 is pretty close to come out (and we can just bite the bullet that way).

[github-actions]

size-limit report

Path	Size
@sentry/browser - CDN Bundle (gzipped)	20.97 KB (-0.01% 🔽)
@sentry/browser - Webpack	21.84 KB (0%)
@sentry/react - Webpack	21.88 KB (0%)
@sentry/browser + @sentry/tracing - CDN Bundle (gzipped)	28.59 KB (+0.83% 🔺)

[AbhiPrasad]

Closing in favour of https://github.com/getsentry/sentry-javascript/tree/abhi-web-vitals-revamp