ln: Interactive and Force override each other instead of defaulting to Force if both are specified

[aweinstock314]

Comparative output from GNU ln and uu ln prior to the fix:

root@b082d601e194:/tmp# ln --version
ln (GNU coreutils) 9.7
Packaged by Debian (9.7-3)
Copyright (C) 2025 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Mike Parker and David MacKenzie.
root@b082d601e194:/tmp# touch a b
root@b082d601e194:/tmp# ln -sfi a b
ln: replace 'b'? n
root@b082d601e194:/tmp# ls -l
total 0
-rw-r--r-- 2 root root 0 Feb 26 00:01 a
-rw-r--r-- 2 root root 0 Feb 26 00:01 b
root@b082d601e194:/tmp# ln -sif a b
root@b082d601e194:/tmp# ls -l
total 0
-rw-r--r-- 1 root root 0 Feb 26 00:01 a
lrwxrwxrwx 1 root root 1 Feb 26 00:01 b -> a

root@03081849be59:/tmp# ln --version
ln (uutils coreutils) 0.6.0
root@03081849be59:/tmp# touch a b
root@03081849be59:/tmp# ln -sif a b
root@03081849be59:/tmp# ls -l
total 0
-rw-r--r-- 1 root root 0 Feb 26 00:02 a
lrwxrwxrwx 1 root root 1 Feb 26 00:02 b -> a
root@03081849be59:/tmp# rm a b
root@03081849be59:/tmp# touch a b
root@03081849be59:/tmp# ls -l
total 0
-rw-r--r-- 1 root root 0 Feb 26 00:02 a
-rw-r--r-- 1 root root 0 Feb 26 00:02 b
root@03081849be59:/tmp# ln -sfi a b
root@03081849be59:/tmp# ls -l
total 0
-rw-r--r-- 1 root root 0 Feb 26 00:02 a
lrwxrwxrwx 1 root root 1 Feb 26 00:02 b -> a

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/tty/tty-eof (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/cut/cut-huge-range is now passing!
Congrats! The gnu test tests/rm/many-dir-entries-vs-OOM is now passing!
Congrats! The gnu test tests/unexpand/bounded-memory is now passing!
Skip an intermittent issue tests/pr/bounded-memory (was skipped on 'main', now failing)