Bump webpack-dev-server and powerbi-visuals-tools in /packages/powerbi

Bumps [webpack-dev-server](https://github.com/webpack/webpack-dev-server) to 5.2.2 and updates ancestor dependency [powerbi-visuals-tools](https://github.com/Microsoft/PowerBI-visuals-tools). These dependencies need to be updated together.


Updates `webpack-dev-server` from 4.15.2 to 5.2.2
- [Release notes](https://github.com/webpack/webpack-dev-server/releases)
- [Changelog](https://github.com/webpack/webpack-dev-server/blob/master/CHANGELOG.md)
- [Commits](webpack/webpack-dev-server@v4.15.2...v5.2.2)

Updates `powerbi-visuals-tools` from 5.5.0 to 5.6.0
- [Release notes](https://github.com/Microsoft/PowerBI-visuals-tools/releases)
- [Changelog](https://github.com/microsoft/PowerBI-visuals-tools/blob/main/Changelog.md)
- [Commits](microsoft/PowerBI-visuals-tools@5.5.0...5.6.0)

---
updated-dependencies:
- dependency-name: webpack-dev-server
  dependency-version: 5.2.2
  dependency-type: indirect
- dependency-name: powerbi-visuals-tools
  dependency-version: 5.6.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]