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
 }

pkg/setting/setting_azure_test.go

@@ -215,4 +215,34 @@ func TestAzureSettings(t *testing.T) {
 			assert.Empty(t, cfg.Azure.UserIdentityTokenEndpoint.ClientSecret)
 		})
 	})
+
+	t.Run("forward settings to plugins", func(t *testing.T) {
+		testCases := []struct {
+			name            string
+			configuredValue string
+			resolvedValue   []string
+		}{
+			{
+				name:            "should be set to user plugins if set",
+				configuredValue: "test-datasource",
+				resolvedValue:   []string{"test-datasource"},
+			},
+		}
+
+		for _, c := range testCases {
+			t.Run(c.name, func(t *testing.T) {
+				cfg := NewCfg()
+
+				azureSection, err := cfg.Raw.NewSection("azure")
+				require.NoError(t, err)
+				_, err = azureSection.NewKey("forward_settings_to_plugins", c.configuredValue)
+				require.NoError(t, err)
+
+				cfg.readAzureSettings()
+				require.NotNil(t, cfg.Azure)
+
+				assert.Equal(t, c.resolvedValue, cfg.Azure.ForwardSettingsPlugins)
+			})
+		}
+	})
 }