fix(test): Adapt test for CI/CD

Pytorch's RNG seems to behave differently in the docker image with
Pytorch XLA 2.3.0. This leads to different results when using
do_sample=True, so tests have been updated accordingly.

text-generation-inference/tests/test_generator.py

@@ -75,8 +75,8 @@ def create_request(
         ],
         [
             "It was a bright cold day in April, and the clocks were striking thirteen.",
-            1439,
-            " All",
+            775,
+            " We",
             True,
         ],
     ],
@@ -117,7 +117,7 @@ def test_prefill(input_text, token_id, token_text, do_sample, batch_size, model_
         [
             "It was a bright cold day in April, and the clocks were striking thirteen.",
             20,
-            " All was silent, and it seemed, as was the custom in the United States, that the day",
+            " We sat outside the house, drinking coffee, listening to the traffic. And then, suddenly, we",
             True,
         ],
     ],