Switch tests to run on Adafruit_CircuitPython_asyncio (fails)

This also depends on adafruit/Adafruit_CircuitPython_Ticks#8
otherwise adafruit_ticks is unimportable and the tests are just skipped.

Several of the tests fail, and one runs forever instead of terminating.

We should fix our asyncio until the tests patch, then incorporate this
change.

Author: jepler

tests/run-tests.py

@@ -870,8 +870,14 @@ def main():
 
     if not args.keep_path:
         # clear search path to make sure tests use only builtin modules and those in extmod
-        os.environ["MICROPYPATH"] = os.pathsep + ".frozen" + os.pathsep + base_path("../extmod")
-
+        os.environ["MICROPYPATH"] = os.pathsep.join(
+            [
+                "",
+                ".frozen",
+                base_path("../frozen/Adafruit_CircuitPython_asyncio"),
+                base_path("../frozen/Adafruit_CircuitPython_Ticks"),
+            ]
+        )
     try:
         os.makedirs(args.result_dir, exist_ok=True)
         res = run_tests(pyb, tests, args, args.result_dir, args.jobs)