Add advection and SUPG advection forms

This basically adds the following forms,

Advection form (with both constant and variable

$c_p$

),

$\int_{\Omega} c_p (\bar{u} \cdot \nabla T_h) d\Omega$

SUPG Advection form,

$\int_{\Omega} c_p (\bar{u} \cdot \nabla T_h) (\delta u \cdot \nabla s_h) d\Omega$

added new form label

requested review from @kohl

assigned to @pponkumar

changed the description

approved this merge request

Merging main should make the CI pass.

added 16 commits

• 36b82ee2...8dd65bec - 14 commits from branch main
• 642d34ac - Add supg advection forms
• b1b8fedb - Add const and var cp advection forms

Compare with previous version

enabled an automatic merge when the pipeline for b1b8fedb succeeds

merged

mentioned in commit a96fef14