Add Job and secrets support for k8s-kind deployments (#995)

Part of https://plan.wireit.in/deepstack/browse/VUL-315

Reviewed-on: cerc-io/stack-orchestrator#995
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>

tests/scripts/install-kind.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 # TODO: handle ARM
-curl --silent -Lo ./kind https://kind.sigs.k8s.io/dl/v0.20.0/kind-linux-amd64
+curl --silent -Lo ./kind https://kind.sigs.k8s.io/dl/v0.25.0/kind-linux-amd64
 chmod +x ./kind
 mv ./kind /usr/local/bin

tests/scripts/install-kubectl.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 # TODO: handle ARM
-curl --silent -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
+# Pin kubectl to match Kind's default k8s version (v1.31.x)
+curl --silent -LO "https://dl.k8s.io/release/v1.31.2/bin/linux/amd64/kubectl"
 chmod +x ./kubectl
 mv ./kubectl /usr/local/bin