Bump playwright and artillery in /test/load (#4678)

Bumps [playwright](https://github.com/microsoft/playwright) to 1.56.1 and updates ancestor dependency [artillery](https://github.com/artilleryio/artillery). These dependencies need to be updated together.


Updates `playwright` from 1.55.0 to 1.56.1
- [Release notes](https://github.com/microsoft/playwright/releases)
- [Commits](https://github.com/microsoft/playwright/compare/v1.55.0...v1.56.1)

Updates `artillery` from 2.0.26 to 2.0.27
- [Release notes](https://github.com/artilleryio/artillery/releases)
- [Commits](https://github.com/artilleryio/artillery/compare/artillery-2.0.26...artillery-2.0.27)

---
updated-dependencies:
- dependency-name: playwright
  dependency-version: 1.56.1
  dependency-type: indirect
- dependency-name: artillery
  dependency-version: 2.0.27
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

test/load/package.json

@@ -9,7 +9,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "artillery": "^2.0.26",
+    "artillery": "^2.0.27",
     "ws": "^7.5.10"
   }
 }