[WIP] Plugins: Refactoring backend initialization flow (#42247)

* refactoring store interface and init flow

* fix import

* fix linter

* refactor resource calling

* load with class

* re-order args

* fix tests

* fix linter

* remove old creator

* add custom config struct

* fix some tests

* cleanup

* fix linter

* add connect failure error

* remove unused err

* convert test over

pkg/plugins/manager/loader/finder/finder.go

@@ -8,17 +8,15 @@ import (
 
 	"github.com/grafana/grafana/pkg/infra/fs"
 	"github.com/grafana/grafana/pkg/infra/log"
-	"github.com/grafana/grafana/pkg/setting"
 	"github.com/grafana/grafana/pkg/util"
 )
 
 type Finder struct {
-	cfg *setting.Cfg
 	log log.Logger
 }
 
-func New(cfg *setting.Cfg) Finder {
-	return Finder{cfg: cfg, log: log.New("plugin.finder")}
+func New() Finder {
+	return Finder{log: log.New("plugin.finder")}
 }
 
 func (f *Finder) Find(pluginDirs []string) ([]string, error) {

pkg/plugins/manager/loader/finder/finder_test.go

@@ -51,7 +51,7 @@ func TestFinder_Find(t *testing.T) {
 	}
 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {
-			f := New(tc.cfg)
+			f := New()
 			pluginPaths, err := f.Find(tc.pluginDirs)
 			if (err != nil) && !errors.Is(err, tc.err) {
 				t.Errorf("Find() error = %v, expected error %v", err, tc.err)