gpg: print fingerprint regardless of keyid-format

* g10/keylist.c (print_fingerprint): use compact format independent of
  keyid-format; (print_key_line): always print the fingerprint

The choice of fingerprint display should be independent of the
keyid-format.

Currently, the representation of the fingerprint changes depending on
whether the user has specified --keyid-format to anything besides
"none". (this is common, for example, if someone happens to have
"keyid-format long" in their gpg.conf for interoperability with older
versions of gpg)

With this changeset, keyid-format governs only the format of the
displayed keyID, while the fingerprint display is governed only by the
fingerprint options:

[default]::

compact fpr of pubkey only

--with-fingerprint::

human-readable form of fpr of pubkey only

--with-fingerprint --with-fingerprint::

human-readable form of pubkey and subkey

--with-subkey-fingerprint:

compact fpr for pubkey and subkeys

• Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>