Plugins: Refactor plugin config into separate env var and request scoped services (#83261)

* seperate services for env + req

* merge with main

* fix tests

* undo changes to golden file

* fix linter

* remove unused fields

* split out new config struct

* provide config

* undo go mod changes

* more renaming

* fix tests

* undo bra.toml changes

* update go.work.sum

* undo changes

* trigger

* apply PR feedback

pkg/services/pluginsintegration/pluginconfig/config_test.go

@@ -0,0 +1,38 @@
+package pluginconfig
+
+import (
+	"testing"
+
+	"gopkg.in/ini.v1"
+
+	"github.com/grafana/grafana/pkg/setting"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPluginSettings(t *testing.T) {
+	raw, err := ini.Load([]byte(`
+		[plugins]
+		test_key = 123
+
+		[plugin.test-datasource]
+		foo = 5m
+		bar = something
+
+		[plugin.secret-plugin]
+		secret_key = secret
+		normal_key = not a secret`))
+	require.NoError(t, err)
+
+	cfg := &setting.Cfg{Raw: raw}
+	settings := &setting.OSSImpl{Cfg: cfg}
+
+	ps := extractPluginSettings(settings)
+	require.Len(t, ps, 2)
+	require.Len(t, ps["test-datasource"], 2)
+	require.Equal(t, ps["test-datasource"]["foo"], "5m")
+	require.Equal(t, ps["test-datasource"]["bar"], "something")
+	require.Len(t, ps["secret-plugin"], 2)
+	require.Equal(t, ps["secret-plugin"]["secret_key"], "secret")
+	require.Equal(t, ps["secret-plugin"]["normal_key"], "not a secret")
+}