Merge topic 'fortran-in-custom-targets' into release-3.27

d870a47e Tests/FortranModules: add a test for iface Fortran sources
e3d511fb Tests/FortranModules: also test INTERFACE targets with Fortran sources
978b68d3 add_custom_target: Fix regression with Fortran sources
619aca80 Tests/FortranModules: add a test case for #25223
45513c1a Tests/FortranModules: move issue 25112 fix from FortranOnly

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !8814