[Misc] Set default value of seed to None (#14274)

Signed-off-by: மனோஜ்குமார் பழனிச்சாமி <smartmanoj42857@gmail.com>

tests/entrypoints/llm/test_guided_generate.py

@@ -21,7 +21,7 @@ GUIDED_DECODING_BACKENDS = ["outlines", "lm-format-enforcer", "xgrammar"]
 def llm():
     # pytest caches the fixture so we use weakref.proxy to
     # enable garbage collection
-    llm = LLM(model=MODEL_NAME, max_model_len=1024)
+    llm = LLM(model=MODEL_NAME, max_model_len=1024, seed=0)
 
     with llm.deprecate_legacy_api():
         yield weakref.proxy(llm)