[Patch, Fortran] PR34763 - Allow "END" without "END SUBROUTINE" in INTERFACE

[Tobias Burnus]

FUNCTION and SUBROUTINE need to end with "END FUNCTION/SUBROUTINE" if
they are module procedures or internal procedures.

Before, all preceding states were tested. The modified check now only
checks for the direct parent.

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

Tobias
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