tests: Replace umodule with module everywhere.

This work was funded through GitHub Sponsors.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

tests/extmod/re_stack_overflow.py

@@ -0,0 +1,10 @@
+try:
+    import re
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+try:
+    re.match("(a*)*", "aaa")
+except RuntimeError:
+    print("RuntimeError")