[TPU][V1][CI] Replace `python3 setup.py develop` with standard `pip install --e` on TPU (#17374)

Signed-off-by: NickLucche <nlucches@redhat.com>

docker/Dockerfile.tpu

@@ -23,7 +23,7 @@ RUN --mount=type=cache,target=/root/.cache/pip \
     --mount=type=bind,source=.git,target=.git \
     python3 -m pip install \
         -r requirements/tpu.txt
-RUN python3 setup.py develop
+RUN python3 -m pip install -e .
 
 # install development dependencies (for testing)
 RUN python3 -m pip install -e tests/vllm_test_utils

docs/source/getting_started/installation/ai_accelerator/tpu.inc.md

@@ -158,7 +158,7 @@ sudo apt-get install libopenblas-base libopenmpi-dev libomp-dev
 Run the setup script:
 
 ```bash
-VLLM_TARGET_DEVICE="tpu" python setup.py develop
+VLLM_TARGET_DEVICE="tpu" python -m pip install -e .
 ```
 
 ## Set up using Docker