Switch most remaining extensions to use esbuild

Just 3 left:

- git and github. These are doing weird stuff with d.ts imports and const enums

- github-authentication  which has some tricky path mapping stuff

extensions/microsoft-authentication/.vscodeignore

@@ -2,7 +2,7 @@
 .vscode-test/**
 out/test/**
 out/**
-extension.webpack.config.js
+esbuild*.mts
 package-lock.json
 src/**
 .gitignore