ls: follow symlinks for xattrs, fix #8216

[sudhackar]

$ strace -e llistxattr,listxattr,getxattr ./target/debug/coreutils ls -lLd l
listxattr("l", 0x1, 0)                  = 24
listxattr("l", "system.posix_acl_access\0", 24) = 24
drwxrwxr-x+ 2 sudhackar sudhackar 4096 Jun 18 16:47 l
+++ exited with 0 +++

as compared to no +

[sudhackar]

This should fix #8216

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/misc/tee (fails in this run but passes in the 'main' branch)
Note: The gnu test tests/ls/no-cap is now being skipped but was previously passing.

[sudhackar]

I have fixed the patch for the GNU test - that passes now instead of SKIP

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/misc/tee (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/timeout/timeout (fails in this run but passes in the 'main' branch)

[sudhackar]

tests/misc/tee seems flaky locally - failed 1 out of 10 runs for me

[sylvestre]

we know, just ignore it :)

[sylvestre]

(but don't hesitate to have a look to fix it if you can reproduce it easily :)