Raise minimum Node.js version to 20, test on 24 (#34713)

- Node.js 18 is now EOL, so raise minimum version to current LTS v20
- Test on 24
- Change devcontainers to use LTS version (currently 22),
[ref](https://github.com/devcontainers/features/tree/main/src/node)

package-lock.json

@@ -117,7 +117,7 @@
         "vue-tsc": "2.2.10"
       },
       "engines": {
-        "node": ">= 18.0.0"
+        "node": ">= 20.0.0"
       }
     },
     "node_modules/@alloc/quick-lru": {