feat(browser): Add outgoingRequest context to fetch errors

[mydea]

For now, this only adds method and url fields.

Implements #15846 for fetch only. This is probably the most important, not sure if we also want to add this to XMLHttpRequest handling (it is possible there but a bit trickier, as we'd need to parse method/url out of the request etc)

[github-actions]

size-limit report 📦

Path	Size	% Change	Change
@sentry/browser	23.14 KB	+0.29%	+67 B 🔺
@sentry/browser - with treeshaking flags	22.95 KB	+0.32%	+73 B 🔺
@sentry/browser (incl. Tracing)	36.55 KB	+0.17%	+62 B 🔺
@sentry/browser (incl. Tracing, Replay)	73.73 KB	+0.11%	+81 B 🔺
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	67.08 KB	+0.12%	+79 B 🔺
@sentry/browser (incl. Tracing, Replay with Canvas)	78.38 KB	+0.1%	+80 B 🔺
@sentry/browser (incl. Tracing, Replay, Feedback)	90.96 KB	+0.1%	+89 B 🔺
@sentry/browser (incl. Feedback)	40.28 KB	+0.19%	+75 B 🔺
@sentry/browser (incl. sendFeedback)	27.79 KB	+0.28%	+79 B 🔺
@sentry/browser (incl. FeedbackAsync)	32.57 KB	+0.23%	+74 B 🔺
@sentry/react	24.94 KB	+0.31%	+78 B 🔺
@sentry/react (incl. Tracing)	38.44 KB	+0.14%	+54 B 🔺
@sentry/vue	27.36 KB	+0.23%	+62 B 🔺
@sentry/vue (incl. Tracing)	38.25 KB	+0.18%	+69 B 🔺
@sentry/svelte	23.17 KB	+0.26%	+60 B 🔺
CDN Bundle	24.4 KB	+0.29%	+72 B 🔺
CDN Bundle (incl. Tracing)	36.56 KB	+0.14%	+51 B 🔺
CDN Bundle (incl. Tracing, Replay)	71.58 KB	+0.08%	+54 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback)	76.76 KB	+0.08%	+58 B 🔺
CDN Bundle - uncompressed	71.16 KB	+0.33%	+239 B 🔺
CDN Bundle (incl. Tracing) - uncompressed	108.33 KB	+0.2%	+219 B 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed	219.62 KB	+0.1%	+218 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	232.18 KB	+0.1%	+218 B 🔺
@sentry/nextjs (client)	39.72 KB	+0.13%	+51 B 🔺
@sentry/sveltekit (client)	36.97 KB	+0.15%	+55 B 🔺
@sentry/node	142.93 KB	+0.02%	+29 B 🔺
@sentry/node - without tracing	96.14 KB	+0.04%	+33 B 🔺
@sentry/aws-serverless	120.48 KB	+0.03%	+29 B 🔺

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