gh-146410: Add --pythoninfo to make testios (#146494)

Add --pythoninfo option to dump build information.

Author: vstinner

Makefile.pre.in

@@ -2361,7 +2361,7 @@ testios:
 	$(PYTHON_FOR_BUILD) $(srcdir)/Apple/testbed clone --framework $(PYTHONFRAMEWORKPREFIX) "$(XCFOLDER)"
 
 	# Run the testbed project
-	$(PYTHON_FOR_BUILD) "$(XCFOLDER)" run --verbose -- test -uall --single-process --rerun -W
+	$(PYTHON_FOR_BUILD) "$(XCFOLDER)" run --verbose -- test -uall --single-process --rerun -W --pythoninfo
 
 # Like test, but using --slow-ci which enables all test resources and use
 # longer timeout. Run an optional pybuildbot.identify script to include