Remove dependency on the runner's volume (#244)

* bump actions

* experiment using init container to prepare working environment

* rm script before continuing

* fix

* Update packages/k8s/src/hooks/run-script-step.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* leverage exec stat instead of printf

* npm update

* document the new constraint

---------

Co-authored-by: DenisPalnitsky <DenisPalnitsky@users.noreply.github.com>

packages/k8s/README.md

@@ -22,9 +22,6 @@ rules:
 - apiGroups: [""]
   resources: ["pods/log"]
   verbs: ["get", "list", "watch",]
-- apiGroups: ["batch"]
-  resources: ["jobs"]
-  verbs: ["get", "list", "create", "delete"]
 - apiGroups: [""]
   resources: ["secrets"]
   verbs: ["get", "list", "create", "delete"]
@@ -43,3 +40,4 @@ rules:
 - Building container actions from a dockerfile is not supported at this time
 - Container actions will not have access to the services network or job container network
 - Docker [create options](https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idcontaineroptions) are not supported
+- Container actions will have to specify the entrypoint, since the default entrypoint will be overridden to run the commands from the workflow.