fix(vue): Do not depend on window.location for SSR environments

[mydea]

When rendering in an SSR environment, window.location may not be defined. In this case, we should not error but just not start a transaction.

There may be more graceful ways to handle this, but IMHO this should be fine (and def. better than breaking in SSR).

Closes #7515

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	20.49 KB (0%)
@sentry/browser - ES5 CDN Bundle (minified)	63.56 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	19.11 KB (+0.01% 🔺)
@sentry/browser - ES6 CDN Bundle (minified)	56.63 KB (0%)
@sentry/browser - Webpack (gzipped + minified)	21.68 KB (0%)
@sentry/browser - Webpack (minified)	72.17 KB (0%)
@sentry/react - Webpack (gzipped + minified)	21.72 KB (0%)
@sentry/nextjs Client - Webpack (gzipped + minified)	52.05 KB (0%)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	33.78 KB (0%)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	26.14 KB (0%)
@sentry/replay ES6 CDN Bundle (gzipped + minified)	44.23 KB (+0.5% 🔺)
@sentry/replay - Webpack (gzipped + minified)	38.28 KB (+0.52% 🔺)
@sentry/browser + @sentry/tracing + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	62.45 KB (+0.35% 🔺)
@sentry/browser + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	55.52 KB (+0.38% 🔺)