chore(deps): bump jsonpath-plus and artillery in /src/load-generator

Bumps [jsonpath-plus](https://github.com/s3u/JSONPath) to 10.2.0 and updates ancestor dependency [artillery](https://github.com/artilleryio/artillery). These dependencies need to be updated together.


Updates `jsonpath-plus` from 7.2.0 to 10.2.0
- [Release notes](https://github.com/s3u/JSONPath/releases)
- [Changelog](https://github.com/JSONPath-Plus/JSONPath/blob/main/CHANGES.md)
- [Commits](JSONPath-Plus/JSONPath@v7.2.0...v10.2.0)

Updates `artillery` from 2.0.16 to 2.0.21
- [Release notes](https://github.com/artilleryio/artillery/releases)
- [Commits](artilleryio/artillery@artillery-2.0.16...artillery-2.0.21)

---
updated-dependencies:
- dependency-name: jsonpath-plus
  dependency-type: indirect
- dependency-name: artillery
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>