hardcode kube-bench v0.7.0 to fix 'glibc X not found' errors (#5087)

Author: laverya

testgrid/specs/full.yaml

@@ -1251,8 +1251,7 @@
       version: "latest"
   postUpgradeScript: |
     echo "running  CIS Kubernetes Benchmark Checks"
-    kube_bench_version="$(curl -s https://api.github.com/repos/aquasecurity/kube-bench/releases/latest | grep '"tag_name":' | sed -E 's/.*"v([^"]+)".*/\1/')"
-    curl -L https://github.com/aquasecurity/kube-bench/releases/download/v${kube_bench_version}/kube-bench_${kube_bench_version}_linux_amd64.tar.gz | tar -xz
+    curl -L https://github.com/aquasecurity/kube-bench/releases/download/v0.7.0/kube-bench_0.7.0_linux_amd64.tar.gz | tar -xz
     ./kube-bench --config-dir=`pwd`/cfg --config=`pwd`/cfg/config.yaml --exit-code=1
 - name: k8s129x_reserved_resources
   installerSpec:
@@ -2230,8 +2229,7 @@
       version: "latest"
   postInstallScript: |
     echo "running CIS Kubernetes Benchmark Checks"
-    kube_bench_version="$(curl -s https://api.github.com/repos/aquasecurity/kube-bench/releases/latest | grep '"tag_name":' | sed -E 's/.*"v([^"]+)".*/\1/')"
-    curl -L https://github.com/aquasecurity/kube-bench/releases/download/v${kube_bench_version}/kube-bench_${kube_bench_version}_linux_amd64.tar.gz | tar -xz
+    curl -L https://github.com/aquasecurity/kube-bench/releases/download/v0.7.0/kube-bench_0.7.0_linux_amd64.tar.gz | tar -xz
     ./kube-bench --config-dir=`pwd`/cfg --config=`pwd`/cfg/config.yaml --exit-code=1
     echo "Checking kubectl with kube/config"
     echo "Kubeconfig was $KUBECONFIG"