Chore: Refactor OAuth/social package to service (#35403)

* Creating SocialService

* Add GetOAuthProviders as socialService method

* Add OAuthTokenService

* Add GetOAuthHttpClient method to SocialService

* Rename services, access socialMap from GetConnector

* Fix tests by mocking oauthtoken methods

* Move NewAuthService into Init

* Move OAuthService to social pkg

* Refactor OAuthService to OAuthProvider

* Fix nil map error, rename file, simplify tests

* Fix bug for Forward OAuth Identify

* Remove file after rebase

pkg/services/datasourceproxy/datasourceproxy.go

@@ -14,6 +14,7 @@ import (
 	"github.com/grafana/grafana/pkg/plugins"
 	"github.com/grafana/grafana/pkg/registry"
 	"github.com/grafana/grafana/pkg/services/datasources"
+	"github.com/grafana/grafana/pkg/services/oauthtoken"
 	"github.com/grafana/grafana/pkg/setting"
 )
 
@@ -27,6 +28,7 @@ type DatasourceProxyService struct {
 	PluginManager          plugins.Manager               `inject:""`
 	Cfg                    *setting.Cfg                  `inject:""`
 	HTTPClientProvider     httpclient.Provider           `inject:""`
+	OAuthTokenService      *oauthtoken.Service           `inject:""`
 }
 
 func (p *DatasourceProxyService) Init() error {
@@ -68,7 +70,7 @@ func (p *DatasourceProxyService) ProxyDatasourceRequestWithID(c *models.ReqConte
 	}
 
 	proxyPath := getProxyPath(c)
-	proxy, err := pluginproxy.NewDataSourceProxy(ds, plugin, c, proxyPath, p.Cfg, p.HTTPClientProvider)
+	proxy, err := pluginproxy.NewDataSourceProxy(ds, plugin, c, proxyPath, p.Cfg, p.HTTPClientProvider, p.OAuthTokenService)
 	if err != nil {
 		if errors.Is(err, datasource.URLValidationError{}) {
 			c.JsonApiErr(http.StatusBadRequest, fmt.Sprintf("Invalid data source URL: %q", ds.Url), err)