Restore the possibility of building when remote is enabled in libpcap

Restore the possibility of building when remote is enabled in libpcap

This change allows to test the build with HAVE_PCAP_FINDALLDEVS_EX and
HAVE_PCAP_OPEN enabled.

Some ways to run theses tests:

MATRIX_BUILD_LIBPCAP=yes MATRIX_REMOTE=yes MATRIX_CMAKE=no MATRIX_CC=gcc \
MATRIX_CRYPTO=no MATRIX_SMB=no ./build_matrix.sh
(configure should display:
checking for pcap_open... yes
checking for pcap_findalldevs_ex... yes)

MATRIX_BUILD_LIBPCAP=yes MATRIX_REMOTE=yes MATRIX_CMAKE=yes MATRIX_CC=gcc \
MATRIX_CRYPTO=no MATRIX_SMB=no ./build_matrix.sh
(cmake should display:
Looking for pcap_open - found
Looking for pcap_findalldevs_ex - found)

Don't enable the builds with REMOTE=yes by default.

This partially reverts commit 3861a41bfa60b9a8bed2d5a11a2ba7a7b1bbed3d.
"Remove the REMOTE dimension from the nested matrix."