Fortran: fix rank/shape check in interface checking [PR124567]

Fortran: fix rank/shape check in interface checking [PR124567]

	PR fortran/124567

gcc/fortran/ChangeLog:

	* interface.cc (gfc_check_dummy_characteristics): Split shape check
	into a separate check for rank and a check for shape, taking into
	account a corner case where the ambiguity between deferred shape
	and assumed shape has not been fully resolved at the time of
	checking.

gcc/testsuite/ChangeLog:

	* gfortran.dg/pr124567.f90: New test.
	* gfortran.dg/proc_decl_30.f90: Likewise.