FEM: Thermal expansion reference temperature for CalculiX analyses (#19285)

* FEM: Update task_material_common.py

* FEM: Update write_femelement_material.py

* FEM: Update Material.ui

* Fem: Enable material expansion reference temperature

* FEM: Update thermomech_bimetal.py

* FEM: Update thermomech_bimetal.inp

---------

Co-authored-by: marioalexis <mario.passaglia@gmail.com>

src/Mod/Fem/femtest/data/calculix/thermomech_bimetal.inp

@@ -7053,7 +7053,7 @@ Evolumes
 119000,0.343
 *CONDUCTIVITY
 398
-*EXPANSION
+*EXPANSION, ZERO=273
 1.65E-05
 *SPECIFIC HEAT
 385000000
@@ -7064,7 +7064,7 @@ Evolumes
 140000,0.29
 *CONDUCTIVITY
 13.5
-*EXPANSION
+*EXPANSION, ZERO=273
 1.25E-06
 *SPECIFIC HEAT
 515000000