ServiceAccount defaults to 'default' when creating operated resources about thanos-operator

[joshuasimon-taulia]

i was able to use the thanos-operator service account in the objectstore-bucket and objectstore-compactor deployments:

apiVersion: monitoring.banzaicloud.io/v1alpha1
kind: ObjectStore
metadata:
  name: objectstore
spec:
  config:
    mountFrom:
      secretKeyRef:
        name: thanos
        key: object-store.yaml
  bucketWeb:
    label: cluster
    deploymentOverrides:
      spec:
       template:
        spec:
          serviceAccountName: {{ include "thanos-operator-stack.serviceAccountName" $ }}
  {{- with index .Values "thanos-operator" "compact" }}
  compactor:
    deploymentOverrides:
      spec:
        template:
          spec:
            serviceAccountName: {{ include "thanos-operator-stack.serviceAccountName" $ }}

I can't figure out how to customize the storeendpoint-store service account which blocks me from leveraging gcp workload identity.