add lifecycle on pod_template

[jianpingzhangBill]

Request

We running alloy in daemonset to collect pod logs.
We use AWS spot node, it often was removed. But the alloy pods recycled faster then other pods, it will cause some log didn't send to loki.

Can you help add lifecycle and terminationGracePeriodSeconds to pod_template?

lifecycle:
  preStop:
    exec:
      command: ["sleep", "30"]

Use case

Can you help add lifecycle and terminationGracePeriodSeconds to pod_template?

terminationGracePeriodSeconds: 60
lifecycle:
  preStop:
    exec:
      command: ["sleep", "30"]

[etiennep]

This is a duplicate of #1140

[etiennep]

Here's a PR that adds these features: #1774