Correct python & pyenv instructions for deployment (#268)

## What is the goal of this PR?

We've corrected the python and pyenv instructions for deployment.

## What are the changes implemented in this PR?

For deploy-github and deploy-pip-release, we've implemented known working pyenv instructions.

For test-deployment-pip, we've ensured we use Python 3.

.factory/automation.yml

@@ -226,7 +226,7 @@ build:
         bazel run //tests:typedb-extractor -- typedb-all-linux
         ./typedb-all-linux/typedb server &
         python3 -m pip install --extra-index-url https://repo.vaticle.com/repository/pypi-snapshot/simple typedb-client==0.0.0-$FACTORY_COMMIT
-        cd tests/deployment/ && python -m unittest test && export TEST_SUCCESS=0 || export TEST_SUCCESS=1
+        cd tests/deployment/ && python3 -m unittest test && export TEST_SUCCESS=0 || export TEST_SUCCESS=1
         kill $(jps | awk '/TypeDBServer/ {print $1}')
         exit $TEST_SUCCESS
 
@@ -242,9 +242,12 @@ release:
     deploy-github:
       image: vaticle-ubuntu-22.04
       command: |
-        export PATH="$HOME/.local/bin:$PATH"
-        sudo apt install python3-pip -y
-        python3 -m pip install -U pip
+        export PYENV_ROOT="/opt/pyenv"
+        pyenv install 3.7.9
+        pyenv global 3.7.9
+        sudo unlink /usr/bin/python3
+        sudo ln -s $(which python3) /usr/bin/python3
+        sudo ln -s /usr/share/pyshared/lsb_release.py /opt/pyenv/versions/3.7.9/lib/python3.7/site-packages/lsb_release.py
         python3 -m pip install certifi
         export ARTIFACT_USERNAME=$REPO_VATICLE_USERNAME
         export ARTIFACT_PASSWORD=$REPO_VATICLE_PASSWORD
@@ -256,9 +259,12 @@ release:
     deploy-pip-release:
       image: vaticle-ubuntu-20.04
       command: |
-        export PATH="$HOME/.local/bin:$PATH"
-        sudo apt install python3-pip -y
-        python3 -m pip install -U pip
+        export PYENV_ROOT="/opt/pyenv"
+        pyenv install 3.7.9
+        pyenv global 3.7.9
+        sudo unlink /usr/bin/python3
+        sudo ln -s $(which python3) /usr/bin/python3
+        sudo ln -s /usr/share/pyshared/lsb_release.py /opt/pyenv/versions/3.7.9/lib/python3.7/site-packages/lsb_release.py
         export ARTIFACT_USERNAME=$REPO_VATICLE_USERNAME
         export ARTIFACT_PASSWORD=$REPO_VATICLE_PASSWORD
         bazel run @vaticle_dependencies//distribution/artifact:create-netrc