[Patch, Fortran] PR57721 - improve out-of-bounds error message for components

[Tobias Burnus]

The patch changes the out-of-bounds message for "k==11"
   z(i)%y(j)%x(k)=0
from:
   Fortran runtime error: Index '11' of dimension 1 of array 'z' above 
upper bound of 10
to
   Fortran runtime error: Index '11' of dimension 1 of array 'z%y%x' 
above upper bound of 10

(For j out of bounds, it would show "z%y" and for i out of bounds "z".)

Build and regtested on x86-64-gnu-linux.
OK for the trunk?

Tobias
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