Bump github.com/grafana/grafana-plugin-sdk-go from 0.198.0 to 0.259.2

Bumps [github.com/grafana/grafana-plugin-sdk-go](https://github.com/grafana/grafana-plugin-sdk-go) from 0.198.0 to 0.259.2.
- [Release notes](https://github.com/grafana/grafana-plugin-sdk-go/releases)
- [Commits](grafana/grafana-plugin-sdk-go@v0.198.0...v0.259.2)

---
updated-dependencies:
- dependency-name: github.com/grafana/grafana-plugin-sdk-go
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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