Revert "ci: Disable dtrace/systemtap on FreeBSD CI"

This reverts commit b7a93a7ddb.

Accidentally pushed to `origin/main` without review because I typoed the
switch branch command and didn’t notice.

.gitlab-ci.yml

@@ -636,13 +636,7 @@ freebsd-13-x86_64:
     # --fatal-meson-warnings. This should be fixed in Meson 1.4. It’s also fine
     # with Meson 1.2.3 (which is what we use on all the other CI runners).
     # See https://github.com/GNOME/glib/commit/71061fdcb33b8c26f5f8467cb3ac10704d65c87d
-    - meson setup --buildtype debug --wrap-mode=nodownload
-            --localstatedir=/var
-            -Db_lundef=false
-            -Dxattr=false
-            -Dsystemtap=disabled
-            -Ddtrace=disabled
-            _build
+    - meson setup --buildtype debug --wrap-mode=nodownload --localstatedir=/var -Db_lundef=false -Dxattr=false _build
     - meson compile -C _build
     - bash -x ./.gitlab-ci/run-tests.sh
   artifacts: