Merge pull request #16039 from rgacogne/ddist-skip-lb-policy-on-cache-hits

dnsdist: Speed up cache hits by skipping the LB policy when possible

diff --cc pdns/dnsdistdist/Makefile.am
Simple merge

diff --cc pdns/dnsdistdist/dnsdist-configuration-yaml.cc
Simple merge

diff --cc pdns/dnsdistdist/dnsdist.cc
Simple merge

diff --cc pdns/dnsdistdist/meson.build
Simple merge