editors/vscode: Resolve dependency confliction on node10 and 12

vscode has direct build dependency on npm-node10. And also has build dependency
on devel/electron7. devel/electron7 depends on npm-node12. As a result,
editors/vscode has dependency on both npm-node10 and npm-node12 however they
conflicts each other. This confliction of dependency prevent this port building.

PR: 248071
Submitted by: meta (myself)
Approved by: maintainer timeout