Refactor infra tests, clean E2E step suites, and fix TS in tests

tsconfig.tests.json

@@ -0,0 +1,10 @@
+{
+  "extends": "./tsconfig.json",
+  "include": [
+    "tests/**/*.ts",
+    "tests/**/*.tsx"
+  ],
+  "exclude": [
+    "node_modules"
+  ]
+}