ref(node): use native path module to infer path

[JonasBa]

When I initially profiled the code I noticed that the regexp used in splitPath function was dominating the profiles. Both basename and dirname from @sentry/utils were actually calling splitPath which executed the regexp - there were 3 call sites to basename and dirname, 1/3 was conditional. The "optimization" is to call path.parse once and extract each path component - this seems to have contributed to the largest win in terms of performance

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	20.48 KB (0%)
@sentry/browser - ES5 CDN Bundle (minified)	63.49 KB (0%)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	19.05 KB (-0.02% 🔽)
@sentry/browser - ES6 CDN Bundle (minified)	56.39 KB (0%)
@sentry/browser - Webpack (gzipped + minified)	20.7 KB (0%)
@sentry/browser - Webpack (minified)	67.61 KB (0%)
@sentry/react - Webpack (gzipped + minified)	20.73 KB (0%)
@sentry/nextjs Client - Webpack (gzipped + minified)	52.19 KB (0%)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	33.76 KB (0%)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	26.08 KB (0%)
@sentry/replay ES6 CDN Bundle (gzipped + minified)	43.87 KB (0%)
@sentry/replay - Webpack (gzipped + minified)	37.95 KB (0%)
@sentry/browser + @sentry/tracing + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	62.06 KB (0%)
@sentry/browser + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	55.12 KB (-0.01% 🔽)

[JonasBa]

@timfish do you mind pulling the repo and running the test? I'm actually seeing an error locally and I have no idea why/how 🤔

[timfish]

All the tests pass my end!