Don't return error when attempt of sending delta fails to allow next …

…attempt

func ExponentialBackoffWithContext(ctx context.Context, backoff Backoff, condition ConditionWithContextFunc) error
repeats a condition check with exponential backoff.
It immediately returns an error if the condition returns an error,
the context is cancelled or hits the deadline,
or if the maximum attempts defined in backoff is exceeded (ErrWaitTimeout).

internal/castai/castai.go

@@ -234,7 +234,7 @@ func (c *client) SendDelta(ctx context.Context, clusterID string, delta *Delta)
 		resp, err = c.deltaHTTPClient.Do(req)
 		if err != nil {
 			log.Warnf("failed sending delta request: %v", err)
-			return false, fmt.Errorf("sending delta request: %w", err)
+			return false, nil
 		}
 		return true, nil
 	})