Add pod annotations for piped helm

[tetsuya28]

What this PR does / why we need it:
We need to add custom pod annotations for piped pod with Helm.

Which issue(s) this PR fixes:

Fixes #5033

Does this PR introduce a user-facing change?:

• How are users affected by this change: Enable to add pod annotations, but default is empty, means no breaking changes
• Is this breaking change: No
• How to migrate (if breaking change): -

helm template demo piped --debug with podAnnotations ( podAnnotationsInjected: true )

# Source: piped/templates/deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: demo-piped
  labels:
    helm.sh/chart: piped-0.0.0
    app.kubernetes.io/name: piped
    app.kubernetes.io/instance: demo
    app.kubernetes.io/version: "0.0.0"
    app.kubernetes.io/managed-by: Helm
spec:
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app.kubernetes.io/name: piped
      app.kubernetes.io/instance: demo
  template:
    metadata:
      labels:
        app.kubernetes.io/name: piped
        app.kubernetes.io/instance: demo
      annotations:
        sidecar.istio.io/inject: "false"
        rollme: "ff8ru"
+       podAnnotationsInjected: true

[khanhtc1202]

@tetsuya28 please sigh off the commit follow this instruction 🙏
https://github.com/pipe-cd/pipecd/pull/5034/checks?check_run_id=27358501377

[khanhtc1202]

Thank you 🐰

[Warashi]

Thank you!