Bump path-to-regexp from 8.2.0 to 8.4.0 in /test/mcp (#305927)

Bumps [path-to-regexp](https://github.com/pillarjs/path-to-regexp) from 8.2.0 to 8.4.0.
- [Release notes](https://github.com/pillarjs/path-to-regexp/releases)
- [Changelog](https://github.com/pillarjs/path-to-regexp/blob/master/History.md)
- [Commits](https://github.com/pillarjs/path-to-regexp/compare/v8.2.0...v8.4.0)

---
updated-dependencies:
- dependency-name: path-to-regexp
  dependency-version: 8.4.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Raymond Zhao <7199958+rzhao271@users.noreply.github.com>

test/mcp/package-lock.json

@@ -1076,12 +1076,13 @@
       }
     },
     "node_modules/path-to-regexp": {
-      "version": "8.2.0",
-      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-8.2.0.tgz",
-      "integrity": "sha512-TdrF7fW9Rphjq4RjrW0Kp2AW0Ahwu9sRGTkS6bvDi0SCwZlEZYmcfDbEsTz8RVk0EHIS/Vd1bv3JhG+1xZuAyQ==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-8.4.0.tgz",
+      "integrity": "sha512-PuseHIvAnz3bjrM2rGJtSgo1zjgxapTLZ7x2pjhzWwlp4SJQgK3f3iZIQwkpEnBaKz6seKBADpM4B4ySkuYypg==",
       "license": "MIT",
-      "engines": {
-        "node": ">=16"
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
       }
     },
     "node_modules/picomatch": {