Move rimraf to prod deps in extensions

The postinstall uses rimraf so it needs to exist in the final build.

Author: code-asher

ci/dev/vscode.patch

@@ -218,12 +218,14 @@ index 0000000000..88b720ceee
 +	common.minifyTask("out-vscode")
 +));
 diff --git a/extensions/package.json b/extensions/package.json
-index 7c668c9744..ceb0728940 100644
+index 7c668c9744..0778f4f7db 100644
 --- a/extensions/package.json
 +++ b/extensions/package.json
-@@ -3,12 +3,12 @@
+@@ -2,13 +2,14 @@
+   "name": "vscode-extensions",
    "version": "0.0.1",
    "description": "Dependencies shared by all extensions",
++  "dependencies_comment": "Move rimraf to dependencies because it is used in the postinstall script.",
    "dependencies": {
 +    "rimraf": "^3.0.2",
      "typescript": "3.9.6"