chore: move to patches (#4997)

* Move integration types into code-server

This will be easier to maintain than to have it as a patch.

* Disable connection token

Using a flag means we will not need to patch it out.  I think this is
new from 1.64?

* Add product.json to build process

This way we do not have to patch it.

* Ship with remote agent package.json

Instead of the root one.  This contains fewer dependencies.

* Let Code handle errors

This way we will not have to patch Code to make this work and I think it
makes sense to let Code handle the request.

If we do want to handle errors we can do it cleanly by patching their
error handler to throw instead.

* Move manifest override into code-server

This way we will not have to patch it.

* Move to patches

- Switch submodule to track upstream
- Add quilt to the process
- Add patches

The node-* ignore was ignoring one of the diffs so I removed it.  This
was added when we were curling Node as node-v{version}-darwin-x64 for
the macOS build but this no longer happens (we use the Node action to
install a specific version now so we just use the system-wide Node).

* Use pre-packaged Code

ci/dev/test-unit.sh

@@ -14,11 +14,17 @@ main() {
   # Our code imports from `out` in order to work during development but if you
   # have only built for production you will have not have this directory.  In
   # that case symlink `out` to a production build directory.
-  local vscode="lib/vscode"
-  local link="$vscode/out"
-  local target="out-build"
-  if [[ ! -e $link ]] && [[ -d $vscode/$target ]]; then
-    ln -s "$target" "$link"
+  if [[ ! -e lib/vscode/out ]]; then
+    pushd lib
+    local out=(vscode-reh-web-*)
+    if [[ -d "${out[0]}" ]]; then
+      ln -s "../${out[0]}/out" ./vscode/out
+    else
+      echo "Could not find lib/vscode/out or lib/vscode-reh-web-*"
+      echo "Code must be built before running unit tests"
+      exit 1
+    fi
+    popd
   fi
 
   # We must keep jest in a sub-directory. See ../../test/package.json for more