Team Sync: Add group mapping to support team sync in the Generic OAuth provider (#36307)

Added group mapping to support team sync in the Generic OAuth provider.

Co-authored-by: Leonard Gram <leo@xlson.com>
Co-authored-by: achatterjee-grafana <70489351+achatterjee-grafana@users.noreply.github.com>
Co-authored-by: Dan Cech <dan@aussiedan.com>
Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>

pkg/setting/setting_oauth.go

@@ -9,6 +9,7 @@ type OAuthInfo struct {
 	EmailAttributePath     string
 	RoleAttributePath      string
 	RoleAttributeStrict    bool
+	GroupsAttributePath    string
 	AllowedDomains         []string
 	HostedDomain           string
 	ApiUrl                 string