fix(tracekit): Handle expo file dir stack frames

[jennmueng]

There was an issue with expo bundles where stack frames were missing, with only [native code] frames showing: getsentry/sentry-react-native#1116.

Upon further investigation, I found that stack frames weren't being retained in tracekit as expo bundles have file-directory filenames, for example:

onPress@/data/user/0/com.sentrytest/files/.expo-internal/bundle-613EDD44F3305B9D75D4679663900F2BCDDDC326F247CA3202A3A4219FD412D3:595:658

this PR added a case to the gecko regex to match filenames like above with \/[\w\-. /=]+, and adds tests with a sample expo exception.

Example issues:

Original with missing stack trace frames:
https://sentry.io/organizations/sentry-sdks/issues/2047835101/

With this PR applied:
https://sentry.io/organizations/sentry-sdks/issues/2047835101/

With a fix to sentry-expo:
https://sentry.io/organizations/sentry-sdks/issues/2052035152/

With both fixes and source maps:
https://sentry.io/organizations/sentry-sdks/issues/2052145181/

[github-actions]

size-limit report

Path	Size
@sentry/browser - CDN Bundle (gzipped)	19.73 KB (+0.08% 🔺)
@sentry/browser - Webpack	20.6 KB (+0.07% 🔺)
@sentry/react - Webpack	20.6 KB (+0.07% 🔺)
@sentry/browser + @sentry/tracing - CDN Bundle (gzipped)	26.88 KB (+0.06% 🔺)