ref(browser): Use ratelimit utils in base transport

[AbhiPrasad]

Ref #4660

This PR converts the browser based transport to use the ratelimit helpers introduced in #4685.

This is primarily used to validate if the helpers will work properly, but also should provide some bundle size wins. nvm I guess RIP.

Resolves https://getsentry.atlassian.net/browse/WEB-661

[github-actions]

size-limit report

Path	Base Size (af7081c)	Current Size	Change
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	19.37 KB	19.41 KB	+0.19% 🔺
@sentry/browser - ES5 CDN Bundle (minified)	61.92 KB	62.03 KB	+0.18% 🔺
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	18.04 KB	18.06 KB	+0.16% 🔺
@sentry/browser - ES6 CDN Bundle (minified)	55.32 KB	55.42 KB	+0.19% 🔺
@sentry/browser - Webpack (gzipped + minified)	22.3 KB	22.33 KB	+0.16% 🔺
@sentry/browser - Webpack (minified)	76.58 KB	76.67 KB	+0.12% 🔺
@sentry/react - Webpack (gzipped + minified)	22.33 KB	22.36 KB	+0.16% 🔺
@sentry/nextjs Client - Webpack (gzipped + minified)	46.56 KB	46.57 KB	+0.03% 🔺
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	25.25 KB	25.29 KB	+0.14% 🔺
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	23.65 KB	23.67 KB	+0.08% 🔺

[lobsterkatie]

LGTM!

[AbhiPrasad]

I don't understand why the tests are failing. Will keep at this for another 20-30 min, and then ask for help!

[AbhiPrasad]

god bless I fixed this - the mocks were wrong