bind create annotation handler directly to plotclick event, not to global graph-click

pass ctrlKey and metaKey through flot events

Tab size was added as 2 in .editorconfig but a tab size of 4 is used
throughout go code base.

This can cause editors such as vscode to automatically reformat open .go
files to tab size 2 from 4.

plugins: refactoring builtIn data source concept, now means data source plugins that you do not need to add via data sources page, that is automatically added as selectable data source, #8095

Merge branch 'always_displayed_datasources' of https://github.com/ctide/grafana into ctide-always_displayed_datasources

org: fixed issue with orgId query param redirect handling when grafana is under subpath and reverse proxy, fixes #8089

* upgrade to aws-sdk-go v1.8.11

* fix test

Add alwaysDisplayed option to datasource plugins, this will allow it to show up as an option to select when adding queries to a panel without actually adding it as a datasource.