Fortran: fix ICE and wrong code with TRANSFER and CHARACTER(kind=4)

Fortran: fix ICE and wrong code with TRANSFER and CHARACTER(kind=4)

gcc/fortran/ChangeLog:

	PR fortran/83079
	* target-memory.c (gfc_interpret_character): Result length is
	in bytes and thus depends on the character kind.
	* trans-intrinsic.c (gfc_conv_intrinsic_transfer): Compute correct
	string length for the result of the TRANSFER intrinsic and for
	temporaries for the different character kinds.

gcc/testsuite/ChangeLog:

	PR fortran/83079
	* gfortran.dg/transfer_char_kind4.f90: New test.