MT#55283 fix python websockets version test

The newest module comes with a version string of "15.0.1" which makes
the conversion to float fail. Use string operations to fix.

Change-Id: Ia13534e9eeab451261d4c48fa782b116652b6904
(cherry picked from commit 9542cc0f3f)

t/auto-daemon-tests-websocket.py

@@ -21,7 +21,9 @@ async def make_ws(cls, proto):
     from platform import python_version
     from websockets import __version__
 
-    if sys.version_info >= (3, 10) and float(__version__) <= 9.1:
+    ws_ver = str(__version__)
+    ws_ver = '.'.join(ws_ver.split('.')[0:2])
+    if sys.version_info >= (3, 10) and float(ws_ver) <= 9.1:
         python_v = python_version()
         msg = "python3-websocket {} unsupported in {}".format(__version__, python_v)
         raise unittest.SkipTest(msg)