test: Add ellswift unit tests

remove util also since unit tests there were removed in #27538

Co-authored-by: theStack <sebastian.falbesoner@gmail.com>

test/functional/test_runner.py

@@ -74,12 +74,12 @@ TEST_EXIT_SKIPPED = 77
 TEST_FRAMEWORK_MODULES = [
     "address",
     "blocktools",
-    "muhash",
+    "ellswift",
     "key",
+    "muhash",
     "ripemd160",
     "script",
     "segwit_addr",
-    "util",
 ]
 
 EXTENDED_SCRIPTS = [