Add github testing workflow, simplify the Makefile because that was
complex because of Travis. Remove the fuzzing, needs to be re-added when
that works properly with go modules (it has been disabled for quite some
time). Multiple builds and files have been added so these tests can all
run in parallel. Our testing now tests a couple of minutes, the codeql
is by far the more expensive.

Move metric's naming test to test/presubmit_test.go

Add longer sleep in the TestAutoAXFR.

Bye bye travis!

Closes: #4266
Signed-off-by: Miek Gieben <miek@miek.nl>