Plugins: Include Azure settings as a part of Grafana config sent in plugin requests (#79342)

* Add Azure settings and update tests

* Filter by plugin ID

* Add forward settings config variable

* Update line

* Add tests

* Update so that data sources are fully defined in config

* Update SDK and test

* Fix lint

* Update docs/sources/setup-grafana/configure-grafana/_index.md

Co-authored-by: Andrew Hackmann <5140848+bossinc@users.noreply.github.com>

* Remove unnecessary if

---------

Co-authored-by: Andrew Hackmann <5140848+bossinc@users.noreply.github.com>

pkg/setting/setting_azure.go

@@ -2,6 +2,7 @@ package setting
 
 import (
 	"github.com/grafana/grafana-azure-sdk-go/azsettings"
+	"github.com/grafana/grafana/pkg/util"
 )
 
 func (cfg *Cfg) readAzureSettings() {
@@ -63,5 +64,7 @@ func (cfg *Cfg) readAzureSettings() {
 		azureSettings.UserIdentityTokenEndpoint = tokenEndpointSettings
 	}
 
+	azureSettings.ForwardSettingsPlugins = util.SplitString(azureSection.Key("forward_settings_to_plugins").String())
+
 	cfg.Azure = azureSettings
 }