* update eslint, tsconfig + esbuild to handle new jsx transform
* remove thing that breaks the new jsx transform
* remove react imports
* adjust grafana-icons build
* is this the correct syntax?
* try this
* well this was much easier than expected...
* change grafana-plugin-configs webpack config
* fixes
* fix lockfile
* fix 2 more violations
* use path.resolve instead of require.resolve
* remove react import
* fix react imports
* more fixes
* remove React import
* remove import React from docs
* remove another react import
* delete PanelHeader
* PanelHeaderMenuItem is only used in PageHeader
* PanelHeaderCorner only used by PanelEditorTableView
* PanelHeaderMenuTrigger not used anywhere
* PanelHeaderMenuWrapperNew is PanelHeaderMenuWrapper, old one is deleted
* remove newPanelChromeUI from test
* delete feature flag newPanelChromeUI
* PanelHeaderMenuWrapperNew is PanelHeaderMenuWrapper, old one is deleted
