fix(browser): Avoid showing browser extension error message in non-window global scopes

[Lms24]

This PR relaxes our browser extension detection check. The idea is to avoid showing the error message and blocking Sentry.init if the SDK is not initialized in a window global scope. For instance, this will allow Sentry.init to be executed in (service) workers. We likely don't need to worry about multiple SDK instance collisions in non-window global scopes.

We discussed this a bit internally and there are some caveats to this. Using the browser SDK in workers is a bit problematic as many global APIs are not available in there. However, we currently instruct users to do just that. Long-term, it'd be valuable to have a worker SDK that doesn't expect certain browser/Window APIs to be present at all.

Reviewers, please roast me if this is not a good idea :D

fixes #13152

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser	22.46 KB (+0.07% 🔺)
@sentry/browser (incl. Tracing)	34.24 KB (+0.04% 🔺)
@sentry/browser (incl. Tracing, Replay)	70.3 KB (+0.02% 🔺)
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	63.63 KB (+0.02% 🔺)
@sentry/browser (incl. Tracing, Replay with Canvas)	74.7 KB (+0.02% 🔺)
@sentry/browser (incl. Tracing, Replay, Feedback)	87.28 KB (+0.02% 🔺)
@sentry/browser (incl. Tracing, Replay, Feedback, metrics)	89.12 KB (+0.02% 🔺)
@sentry/browser (incl. metrics)	26.77 KB (+0.05% 🔺)
@sentry/browser (incl. Feedback)	39.38 KB (+0.03% 🔺)
@sentry/browser (incl. sendFeedback)	27.08 KB (+0.07% 🔺)
@sentry/browser (incl. FeedbackAsync)	31.72 KB (+0.05% 🔺)
@sentry/react	25.23 KB (+0.06% 🔺)
@sentry/react (incl. Tracing)	37.24 KB (+0.04% 🔺)
@sentry/vue	26.61 KB (+0.05% 🔺)
@sentry/vue (incl. Tracing)	36.07 KB (+0.03% 🔺)
@sentry/svelte	22.59 KB (+0.07% 🔺)
CDN Bundle	23.65 KB (+0.05% 🔺)
CDN Bundle (incl. Tracing)	35.89 KB (+0.04% 🔺)
CDN Bundle (incl. Tracing, Replay)	70.33 KB (+0.03% 🔺)
CDN Bundle (incl. Tracing, Replay, Feedback)	75.59 KB (+0.02% 🔺)
CDN Bundle - uncompressed	69.41 KB (+0.06% 🔺)
CDN Bundle (incl. Tracing) - uncompressed	106.35 KB (+0.04% 🔺)
CDN Bundle (incl. Tracing, Replay) - uncompressed	218.2 KB (+0.02% 🔺)
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	231.03 KB (+0.02% 🔺)
@sentry/nextjs (client)	37.09 KB (+0.06% 🔺)
@sentry/sveltekit (client)	34.81 KB (+0.05% 🔺)
@sentry/node	114.77 KB (0%)
@sentry/node - without tracing	89.33 KB (-0.01% 🔽)
@sentry/aws-serverless	98.5 KB (-0.01% 🔽)

[chargome]

Still think that's ok given that a worker never has access to window 👍