bug: supplying podAnnotations breaks helm chart

Description

One of the recent adds to the charts accidentally duplicates pod annotations for Confluence's statefulset as seen here

Steps to reproduce

Using the default values found at chart/values.yaml and the following test values:

podAnnotations:
  traffic.sidecar.istio.io/excludeInboundPorts: 5701,8888,8081,8091
  traffic.sidecar.istio.io/excludeOutboundPorts: 5701,8888,8081,8091

1. git checkout 1.15.0-bb.3
2. cd chart
3. helm template --values values.yaml --values test-values.yaml confluence .
4. see rendered StatefulSet

# Source: confluence/templates/statefulset.yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: confluence
  labels:
    helm.sh/chart: confluence-1.15.0-bb.3
    app.kubernetes.io/name: confluence
    app.kubernetes.io/instance: confluence
    app.kubernetes.io/version: "7.19.12"
    app.kubernetes.io/managed-by: Helm
    
spec:
  replicas: 1
  serviceName: confluence
  selector:
    matchLabels:
      app.kubernetes.io/name: confluence
      app.kubernetes.io/instance: confluence
  template:
    metadata:
      annotations:
        traffic.sidecar.istio.io/excludeInboundPorts: 5701,8888,8081,8091
        traffic.sidecar.istio.io/excludeOutboundPorts: 5701,8888,8081,8091
        traffic.sidecar.istio.io/excludeInboundPorts: 5701,8888,8081,8091
        traffic.sidecar.istio.io/excludeOutboundPorts: 5701,8888,8081,8091
        checksum/config-jvm: 53b709baf5cfb25fcfba46739ecebb41319ca3fc24263ac7b45928740754e15b