fix: added check for initContainer name in workflow template

[dpadhiar]

#7383

If an initContainer omits the name key, the workflow will immediately fail now.

Example workflow from original issue:

apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: spurious-
spec:
  entrypoint: main

  templates:
  - name: main
    dag:
      tasks:
      - name: spurious
        template: spurious

  - name: spurious
    retryStrategy:
      retryPolicy: Always
    initContainers:
    - image: alpine:latest
      # name: sleep
      command:
      - sleep
      - "15"
    container:
      image: alpine:latest
      command:
      - echo
      - "i am running"

Output:

FATA[2021-12-14T11:11:46.032Z] Failed to submit workflow: templates.main.tasks.spurious initContainers must all have container name

[alexec]

One minor change requested. Please dismiss this review once done.

[alexec]

LGTM