chore: Release scripts use safer common tool to install python dependencies (#144)

Author: dazuma

.github/workflows/conformance.yml

@@ -8,7 +8,7 @@ on:
       - main
   workflow_dispatch:
 jobs:
-  build:
+  conformance:
     runs-on: ubuntu-latest
     strategy:
       matrix:

.github/workflows/unit.yml

@@ -8,7 +8,7 @@ on:
       - main
   workflow_dispatch:
 jobs:
-  test:
+  unit-test:
     if: ${{ github.repository == 'GoogleCloudPlatform/functions-framework-ruby' }}
     strategy:
       matrix:

.kokoro/release.sh

@@ -7,9 +7,7 @@ set -eo pipefail
 export GEM_HOME=$HOME/.gem
 export PATH=$GEM_HOME/bin:$PATH
 
-python3 -m pip install git+https://github.com/googleapis/releasetool
-python3 -m pip install gcp-docuploader
 gem install --no-document toys
-
+toys release install-python-tools -v
 python3 -m releasetool publish-reporter-script > /tmp/publisher-script; source /tmp/publisher-script
 toys release perform -v --enable-docs < /dev/null