grafana: Update to 9.2.6

pkgsrc changes:
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* Remove patches since pull request on bluge has been integrated
  (https://github.com/blugelabs/bluge/pull/139)

upstream changes:
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9.2.6 (2022-11-22)
Features and enhancements
  o Alerting: Support Prometheus durations in Provisioning API.
  o SSE: Keep value name from numeric table.
  o Transformations: Make Card Descriptions Clickable.
Bug fixes
  o MS/My/PostgresSQL: Migrate annotation query.
  o Search: Fixes issue with Recent/Starred section always displaying "General" folder.
  o Server: Write internal server error on missing write.

(triaxx)