Convert formatting to use ruff instead of yapf + isort (#26247)

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

tests/entrypoints/test_ssl_cert_refresher.py

@@ -11,7 +11,6 @@ from vllm.entrypoints.ssl import SSLCertRefresher
 
 
 class MockSSLContext(SSLContext):
-
     def __init__(self):
         self.load_cert_chain_count = 0
         self.load_ca_count = 0
@@ -34,7 +33,7 @@ class MockSSLContext(SSLContext):
 
 
 def create_file() -> str:
-    with tempfile.NamedTemporaryFile(dir='/tmp', delete=False) as f:
+    with tempfile.NamedTemporaryFile(dir="/tmp", delete=False) as f:
         return f.name