rhoThermo: Standardised the renaming of rho -> rhoThermo:rho using the typedName function

This renaming only occurs for single-phase compressible solvers instantiating a
rhoThermo, e.g. for liquids, and usually the rhoThermo:rho is not looked-up by
sub-models or boundary conditions and if needed is better obtained from the
thermo package directly.

src/thermophysicalModels/basic/rhoThermo/rhoThermo.C

@@ -127,7 +127,7 @@ Foam::tmp<Foam::scalarField> Foam::rhoThermo::implementation::rho
 
 Foam::tmp<Foam::volScalarField> Foam::rhoThermo::implementation::renameRho()
 {
-    rho_.rename(phasePropertyName("thermo:rho"));
+    rho_.rename(phasePropertyName(Foam::typedName<rhoThermo>("rho")));
     return rho_;
 }