chore: upgrade jest everywhere (#7703)

packages/core/core-flows/jest.config.js

@@ -1,13 +1,5 @@
 module.exports = {
-  transform: {
-    "^.+\\.[jt]s?$": [
-      "ts-jest",
-      {
-        tsconfig: "tsconfig.json",
-        isolatedModules: true,
-      },
-    ],
-  },
+  transform: { "^.+\\.[jt]s$": ["@swc/jest"] },
   testEnvironment: `node`,
   moduleFileExtensions: [`js`, `ts`],
 }