Prepare for Grafana 11

[asimonok]

Resolves #271

Code parameters migration guide:

• data -> context.panel.data
• theme -> context.grafana.theme
• chart -> context.panel.chart
• echarts -> context.echarts
• ecStat -> context.ecStat
• replaceVariables -> context.grafana.replaceVariables
• eventBus -> context.grafana.eventBus
• locationService -> context.grafana.locationService
• notifySuccess -> context.grafana.notifySuccess
• notifyError -> context.grafana.notifyError

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.39%. Comparing base (fdedf1b) to head (a5c26b9).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #272   +/-   ##
=======================================
  Coverage   97.39%   97.39%           
=======================================
  Files          34       34           
  Lines         423      423           
  Branches       72       72           
=======================================
  Hits          412      412           
  Misses         11       11           

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[mikhail-vl]

Looks great!