Merge #9832

9832: vscode extension: use esbuild instead of rollup. r=matklad a=yaymukund

This shaves a couple seconds off our build & trims npm dependencies. I tested it using VSCode's "Install [Extension] from VSIX" option and it seems to work. Note that it changes the root of the package from `out/src/main → out/main`.

Fell out of the discussion in #9179 

Co-authored-by: Mukund Lakshman <[email protected]>

Author: bors[bot]

editors/code/.eslintignore

@@ -1,3 +1,2 @@
 node_modules
 .eslintrc.js
-rollup.config.js