Avoid unnecessary rinfo calls after creating gateways (#909)

Hopefully this fixes #907, as seems this is the only
change in #901 which is somehow related.

---------

Co-authored-by: Ronny Pfannschmidt <opensource@ronnypfannschmidt.de>

changelog/907.bugfix.rst

@@ -0,0 +1,5 @@
+Avoid remote calls during startup as ``execnet`` by default does not ensure remote affinity with the
+main thread and might accidentally schedule the pytest worker into a non-main thread, which breaks numerous frameworks,
+for example ``asyncio``, ``anyio``, ``PyQt/PySide``, etc.
+
+A more safe correction will require thread affinity in ``execnet`` (`pytest-dev/execnet#96 <https://github.com/pytest-dev/execnet/issues/96>`__).