fix: harbor retention rule latestPushed is optional

[rocketeerbkw]

General Checklist

• Affected Issues have been mentioned in the Closing issues section
• Documentation has been written/updated
• PR title is ready for inclusion in changelog

Database Migrations

n/a

Description

Follow up to #4074. latestPushed is supposed to be optional, but leaving it off throws an error:

createHarborRetentionPolicy(input:{
    name: "harbor-policy"
    enabled: true
    rules: [
      {
        name: "all branches, excluding pullrequests"
        pattern: "[^pr-]*/*"
        latestPulled: 3
      },
      {
        name: "pullrequests"
        pattern: "pr-*"
        latestPulled: 1
      }
    ]
    schedule: "3 * * * *"
  }) {
    id
    name
    configuration {
      enabled
      rules {
        name
        pattern
        latestPulled
      }
      schedule
    }
    created
    updated
  }

Error: Provided harbor configuration is not valid: Error: all branches, excluding pullrequests: latestPushed must be a number

Closing issues

n/a

[github-actions]

Overview

Image reference	testlagoon/api:main	lagoon/api:ci-latest
- digest	7d7560b8cd0d	3552effdec88
- tag	main	ci-latest
- vulnerabilities
- platform	linux/amd64	linux/amd64
- size	152 MB	183 MB (+31 MB)
- packages	1568	1568
Base Image	node:22-alpine also known as: • 22-alpine3.23 • 22.22-alpine • 22.22-alpine3.23 • 22.22.3-alpine • 22.22.3-alpine3.23 • jod-alpine • jod-alpine3.23	node:22-alpine also known as: • 22-alpine3.23 • 22.22-alpine • 22.22-alpine3.23 • 22.22.3-alpine • 22.22.3-alpine3.23 • jod-alpine • jod-alpine3.23
- vulnerabilities