perf(astro): reduce unnecessary path resolutions

[anonrig]

• No need to call process.cwd() on every iteration.
• No need to create paths on memory

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	75.94 KB (+0.03% 🔺)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	67.3 KB (+0.03% 🔺)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	60.93 KB (+0.03% 🔺)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	31.88 KB (+0.06% 🔺)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	30.42 KB (0%)
@sentry/browser - Webpack (gzipped)	22.12 KB (0%)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	73.34 KB (+0.01% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	65.01 KB (+0.01% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	31.16 KB (+0.03% 🔺)
@sentry/browser - ES6 CDN Bundle (gzipped)	23.16 KB (+0.05% 🔺)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	203.92 KB (+0.03% 🔺)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	93.81 KB (+0.05% 🔺)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	68.73 KB (+0.07% 🔺)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	34.12 KB (+0.03% 🔺)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	67.71 KB (+0.02% 🔺)
@sentry/react - Webpack (gzipped)	22.16 KB (0%)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	84.35 KB (+0.02% 🔺)
@sentry/nextjs Client - Webpack (gzipped)	48.99 KB (+0.03% 🔺)
@sentry-internal/feedback - Webpack (gzipped)	16.63 KB (0%)

[Lms24]

Thanks!