chore: remove 'pip install' statements from python_library templates [autoapprove] (#1547)

Co-authored-by: Anthonios Partheniou <partheniou@google.com>

Author: SurferJeffAtGoogle

synthtool/gcp/templates/python_library/.kokoro/publish-docs.sh

@@ -21,14 +21,12 @@ export PYTHONUNBUFFERED=1
 export PATH="${HOME}/.local/bin:${PATH}"
 
 # Install nox
-python3 -m pip install --user --upgrade --quiet nox
+python3 -m pip install --require-hashes -r .kokoro/requirements.txt
 python3 -m nox --version
 
 # build docs
 nox -s docs
 
-python3 -m pip install --user gcp-docuploader
-
 # create metadata
 python3 -m docuploader create-metadata \
   --name=$(jq --raw-output '.name // empty' .repo-metadata.json) \

synthtool/gcp/templates/python_library/.kokoro/release.sh

@@ -16,12 +16,9 @@
 set -eo pipefail
 
 # Start the releasetool reporter
-python3 -m pip install gcp-releasetool
+python3 -m pip install --require-hashes -r .kokoro/requirements.txt
 python3 -m releasetool publish-reporter-script > /tmp/publisher-script; source /tmp/publisher-script
 
-# Ensure that we have the latest versions of Twine, Wheel, and Setuptools.
-python3 -m pip install --upgrade twine wheel setuptools
-
 # Disable buffering, so that the logs stream through.
 export PYTHONUNBUFFERED=1
 

synthtool/gcp/templates/python_library/.kokoro/requirements.in

@@ -0,0 +1,8 @@
+gcp-docuploader
+gcp-releasetool
+importlib-metadata
+typing-extensions
+twine
+wheel
+setuptools
+nox