Merge setting.InitXXX into one function with options (#24389)

This PR will merge 3 Init functions on setting packages as 1 and
introduce an options struct.

routers/api/v1/repo/main_test.go

@@ -13,10 +13,11 @@ import (
 )
 
 func TestMain(m *testing.M) {
-	setting.InitProviderAndLoadCommonSettingsForTest()
-	setting.LoadQueueSettings()
 	unittest.MainTest(m, &unittest.TestOptions{
 		GiteaRootPath: filepath.Join("..", "..", "..", ".."),
-		SetUp:         webhook_service.Init,
+		SetUp: func() error {
+			setting.LoadQueueSettings()
+			return webhook_service.Init()
+		},
 	})
 }