Various fixes & improvements
- feat(healthcheck): Improve redis healthcheck (#3422) by @hubertdeng123
- fix: missing mime types and turning off autoindex for js-sdk endpoint (#3395) by @aldy505
- fix: Use js.sentry-cdn.com for JS SDK downloads (#3417) by @BYK
- fix(loader): provide js sdk assets from 4.x (#3415) by @aldy505
- Revert "Revert "ref(feedback): remove issue platform flags after releasing issue types"" (#3403) by @BYK
- Revert "ref(feedback): remove issue platform flags after releasing issue types" (#3402) by @BYK
- ref(feedback): remove issue platform flags after releasing issue types (#3397) by @aliu39
- fix(sentry-admin): Do not wait for command finish to display output (#3390) by @Makhonya