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>

stack_orchestrator/constants.py

@@ -29,6 +29,7 @@ network_key = "network"
 http_proxy_key = "http-proxy"
 image_registry_key = "image-registry"
 configmaps_key = "configmaps"
+secrets_key = "secrets"
 resources_key = "resources"
 volumes_key = "volumes"
 security_key = "security"