Update Code to 1.94.2 (#7026)

* Update Code to 1.94.2

* Convert from yarn to npm

This is to match VS Code.  We were already partially using npm for the
releases so this is some nice alignment.

* Update caniuse-lite

This was complaining on every unit test.

* Update eslint

I was having a bunch of dependency conflicts and eslint seemed to be the
culprit so I just removed it and set it up again, since it seems things
have changed quite a bit.

* Update test dependencies

I was getting oom when running the unit tests...updating seems to work.

* Remove package.json `scripts` property in release

The new pre-install script was being included, which is dev-only.

This was always the intent; did not realize jq's merge was recursive.

* Remove jest and devDependencies in release as well

* Update test extension dependencies

This appears to be conflicting with the root dependencies.

* Fix playwright exec

npm does not let you run binaries like yarn does, as far as I know.

* Fix import of server-main.js

* Fix several tests by waiting for selectors

ci/dev/postinstall.sh

@@ -3,14 +3,13 @@ set -euo pipefail
 
 # Install dependencies in $1.
 install-deps() {
-  local args=(install)
+  local args=()
   if [[ ${CI-} ]]; then
-    args+=(--frozen-lockfile)
+    args+=(ci)
+  else
+    args+=(install)
   fi
-  if [[ "$1" == "lib/vscode" ]]; then
-    args+=(--no-default-rc)
-  fi
-  # If there is no package.json then yarn will look upward and end up installing
+  # If there is no package.json then npm will look upward and end up installing
   # from the root resulting in an infinite loop (this can happen if you have not
   # checked out the submodule yet for example).
   if [[ ! -f "$1/package.json" ]]; then
@@ -19,7 +18,7 @@ install-deps() {
   fi
   pushd "$1"
   echo "Installing dependencies for $PWD"
-  yarn "${args[@]}"
+  npm "${args[@]}"
   popd
 }