fix(browser): Don't use chrome variable name

[AbhiPrasad]

resolves #6880

Using const chrome = ... or similar breaks certain setups based on their bundler config. This makes changes to browser code so that we never declare a variable named chrome.

I tried setting up https://eslint.org/docs/latest/rules/id-denylist to enforce this, but this unfortunately also looks as types declarations (so type K = { chrome: ... } is problematic.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	77.21 KB (0%)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	68.46 KB (0%)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	72.4 KB (0%)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	62.01 KB (0%)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	32.67 KB (0%)
@sentry/browser (incl. browserTracingIntegration) - Webpack (gzipped)	32.67 KB (0%)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	31.02 KB (0%)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	31.02 KB (0%)
@sentry/browser - Webpack (gzipped)	22.27 KB (0%)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	75.37 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	67.03 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	32.87 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped)	23.85 KB (0%)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	210.31 KB (0%)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	99.04 KB (0%)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	71.07 KB (0%)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	35.95 KB (+0.01% 🔺)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	68.74 KB (0%)
@sentry/react - Webpack (gzipped)	22.3 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	85.19 KB (0%)
@sentry/nextjs Client - Webpack (gzipped)	49.53 KB (0%)
@sentry-internal/feedback - Webpack (gzipped)	17.09 KB (0%)