general: move reddit tests into my/tests + tweak my.core.cfg to be more reliable

tests/orgmode.py

@@ -1,9 +1,9 @@
+from my.tests.common import skip_if_not_karlicoss as pytestmark
+
 from my import orgmode
 from my.core.orgmode import collect
 
-from .common import skip_if_not_karlicoss
 
-@skip_if_not_karlicoss
 def test() -> None:
     # meh
     results = list(orgmode.query().collect_all(lambda n: [n] if 'python' in n.tags else []))