Meson: Do not run tests/refcount with --tap

This is a partial revert of a change introduced in cbc7fbbf.
15 jobs for <span class="ref-name">tap-fix</span> in 35 minutes and 9 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #111570
cross-android_api21_arm64

00:01:33

passed #111571
cross-android_api28_arm64

00:01:37

passed #111572
cross-mingw64

00:02:18

passed #111569
fedora-autotools-x86_64

00:05:42

passed #111568
fedora-x86_64

00:04:37

manual #111575
freebsd-11 allowed to fail manual
freebsd-11-x86_64
passed #111708
win32
msys2-mingw32

00:10:25

passed #111605
win32
vs2017-x64

00:06:54

failed #111625
win32
msys2-mingw32

00:00:18

failed #111606
win32
msys2-mingw32

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failed #111602
win32
msys2-mingw32

00:00:05

failed #111573
win32
msys2-mingw32

00:00:20

failed #111603
win32
vs2017-x64

00:00:03

failed #111574
win32
vs2017-x64

00:00:03

 
  Coverage
passed #111576
coverage

00:02:01

74.6%