borrow fixes from merge-branches

perfmetrics/scripts/testing_on_gke/examples/run-gke-tests.sh

@@ -192,22 +192,24 @@ function installDependencies() {
   # Ensure that realpath is installed.
   which realpath
   # Ensure that make is installed.
-  which make || (sudo apt-get update && sudo apt-get install -y make time)
+  which make || sudo apt-get install -y make time
   # Ensure that go is installed.
   which go || (version=1.22.4 && wget -O go_tar.tar.gz https://go.dev/dl/go${version}.linux-amd64.tar.gz 1>/dev/null && sudo rm -rf /usr/local/go && tar -xzf go_tar.tar.gz 1>/dev/null && sudo mv go /usr/local && echo $PATH && export PATH=$PATH:/usr/local/go/bin && echo $PATH && echo 'export PATH=$PATH:/usr/local/go/bin'>>~/.bashrc && go version)
   # for some reason, the above is unable to update the value of $PATH, so doing it explicitly below.
   export PATH=$PATH:/usr/local/go/bin
   which go
   # Ensure that python3 is installed.
   which python3 || sudo apt-get install -y python3
+  # Install more python tools.
   sudo apt-get -y install python3-dev python3-venv python3-pip
   # Enable python virtual environment.
   python3 -m venv .venv
   source .venv/bin/activate
-  # Ensure that python-absl is installed.
-  sudo apt-get update && sudo apt-get install -y pip
+  # Ensure that pip is installed.
+  sudo apt-get install -y pip
   # python3 -m pip install --upgrade pip
   # python3 -m pip --version
+  # Ensure that python-absl is installed.
   pip install absl-py
   # Ensure that helm is installed
   which helm || (cd "${src_dir}" && (test -d "./helm" || git clone https://github.com/helm/helm.git) && cd helm && make && ls -lh bin/ && mkdir -pv ~/bin && cp -fv bin/helm ~/bin/ && chmod +x ~/bin/helm && export PATH=$PATH:$HOME/bin && echo $PATH && which helm && cd - && cd -)
@@ -227,10 +229,9 @@ function installDependencies() {
     (gcloud components install kubectl && kubectl version --client) || (sudo apt-get update && sudo apt-get install -y kubectl && kubectl version --client)
   fi
   # Ensure that gke-gcloud-auth-plugin is installed.
-  gke-gcloud-auth-plugin --version || (gcloud components install gke-gcloud-auth-plugin && gke-gcloud-auth-plugin --version) || (sudo apt-get update -y && sudo apt-get install -y google-cloud-cli-gke-gcloud-auth-plugin && gke-gcloud-auth-plugin --version)
+  gke-gcloud-auth-plugin --version || (gcloud components install gke-gcloud-auth-plugin && gke-gcloud-auth-plugin --version) || (sudo apt-get install -y google-cloud-cli-gke-gcloud-auth-plugin && gke-gcloud-auth-plugin --version)
   # Ensure that docker is installed.
   if ! which docker ; then
-    sudo apt-get update
     sudo apt install apt-transport-https ca-certificates curl software-properties-common -y
     curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
     sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"