Various fixes & improvements
- feat: Implement new chunk based upload for standalone artifact bundles (1490)
- feat: Inject sourcemap debug ids by default when performing `sourcemaps upload` and print injection report (1513)
- ref: Use recursive walk instead of globbing when looking for `sourcemaps inject` files (1504)
- ref: When injecting sourcemap debug ids, make sure that `sourceMappingURL` comment is always kept at the end of a
file (1511)