tests/run-tests.py: Enable thread tests on esp32.

Before the fix in parent commit, some of these tests hung indefinitely.

After, they seem to consistently pass.

This work was funded through GitHub Sponsors.

Signed-off-by: Angus Gratton <angus@redyak.com.au>

tests/run-tests.py

@@ -1121,7 +1121,9 @@ the last matching regex is used:
                 test_dirs += ("float", "inlineasm", "ports/renesas-ra")
             elif args.target == "rp2":
                 test_dirs += ("float", "stress", "inlineasm", "thread", "ports/rp2")
-            elif args.target in ("esp8266", "esp32", "minimal", "nrf"):
+            elif args.target == "esp32":
+                test_dirs += ("float", "thread")
+            elif args.target in ("esp8266", "minimal", "nrf"):
                 test_dirs += ("float",)
             elif args.target == "wipy":
                 # run WiPy tests