Adding new heat transfer closures into MOOSE-SCM

[luizaldeia]

Motivation

The MOOSE Subchannel Module (MOOSE-SCM) includes a broad library of heat-transfer closures, but extending this set with additional correlations would expand the range of reactor designs for which MOOSE-SCM can be reliably applied.

Design

A few of the suggested correlations to be implemented include:

1. The Schad-modified correlation for the Nusselt number (liquid metals)
2. The Graber and Rieger correlation for the Nusselt number (offers a broader range of P/D, allowing the modeling of a reactor with P/D up to 1.95)

Impact

The proposed correlations would be implemented as additional heat-transfer models within MOOSE-SCM. No changes to existing APIs, input syntax, or default behaviors are expected. The enhancement is backward-compatible and introduces new capabilities only when the user opts into these closures.

[kyriv1980]

Nice. Thank you. I have resolved this in #32029