add codespell action (#18818)

Original work here, #18474,  refixed and updated.

internal/config/identity/openid/provider/provider.go

@@ -53,7 +53,7 @@ var (
 	ErrAccessTokenExpired = errors.New("access_token expired or unauthorized")
 )
 
-// Provider implements indentity provider specific admin operations, such as
+// Provider implements identity provider specific admin operations, such as
 // looking up users, fetching additional attributes etc.
 type Provider interface {
 	LoginWithUser(username, password string) error