Measurement of the inclusive production of the $\eta'(958)$ and $f_0(980)$ mesons in $e^+e^-$ annihilation in the Upsilon region. Data are taken on the $\Upsilon(1S)$, $\Upsilon(2S)$ and $\Upsilon(4S)$ resonances and in the nearby continuum (9.36 to 10.45 GeV center-of-mass energy)