build: Update `swc_core` to `v21.0.1` (#77918)
### What?
Update swc_core to the latest version. ChangeLog: https://github.com/swc-project/swc/compare/swc_core%40v19.0.0...swc_core%40v21.0.1
### Why?
To keep in sync & apply https://github.com/swc-project/swc/pull/10314
### How?
Closes NDX-967
