Datagrid Panel: Edit data within your dashboards (#66353)

* wip

* Datagrid WIP: snapshotting when data edited, better UI for adding column/rows, refactors

* wip

* WIP

* wip

* Add series selector

* Delete selection on key press

* wip

* Multiple row select and delete

* wip

* draggable rows/columns, better column width calculator

* bug fixes

* scrollbars

* add feature flag

* bugfixes

* bugfixes

* bugfixes

* bugfixes

* Add possibility to rename column

* Input fixes

* bugfixes

* bugfixes

* performance optimisations

* WIP component refactoring and optimisations

* comment bit of code to remove error for testing

* fix column move and payload types

* WIP refactors and tests

* e2e tests

* queryGroup subscription refactor

* queryGroup - add component on update, fix failing tests

* refactor querygroup

* querygroup refactor

* tests

* fix codeowners validation

* lint fixes

* revert convertFieldType modification in favor of already merged mod + re-add mistakenly deleted line

* remove //ts-ignores

* Minor style tweaks

* fix

* align colors with theme

* fixes

* refactor

* add test for convertFieldType transformer and write todo

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Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

.github/CODEOWNERS

@@ -389,6 +389,7 @@ lerna.json @grafana/frontend-ops
 /public/app/plugins/panel/bargauge/ @grafana/grafana-bi-squad
 /public/app/plugins/panel/dashlist/ @grafana/grafana-frontend-platform
 /public/app/plugins/panel/debug/ @ryantxu
+/public/app/plugins/panel/datagrid/ @grafana/grafana-bi-squad
 /public/app/plugins/panel/gauge/ @grafana/grafana-bi-squad
 /public/app/plugins/panel/gettingstarted/ @grafana/grafana-frontend-platform
 /public/app/plugins/panel/graph/ @grafana/dataviz-squad