refactor: add scripts to separate unit, e2e tests

ci/steps/test-e2e.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+main() {
+  cd "$(dirname "$0")/../.."
+
+  ./release-packages/code-server*-linux-amd64/bin/code-server --home $CODE_SERVER_ADDRESS/healthz &
+  yarn --frozen-lockfile
+  yarn test:e2e
+}
+
+main "$@"

ci/steps/test-unit.sh

@@ -6,7 +6,7 @@ main() {
 
   yarn --frozen-lockfile
 
-  yarn test
+  yarn test:unit
 }
 
 main "$@"