feat(docker): Support releaseTimestamp for DockerHub tag results

[zharinov]

Changes

Context

• Closes: Include digest and releaseTimestamp from Docker Hub result #24135

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[rarkins]

I saw:

DEBUG: Docker: Failed to parse some tags from Docker Hub (repository=renovate-reproductions/dockertags1)
       "error": {
         "message": "Schema error",
         "stack": "ZodError: Schema error\n    at Object.transform (/Users/rhys/src/github/renovatebot/renovate/lib/util/schema-utils.ts:65:21)\n    at /Users/rhys/src/github/renovatebot/renovate/node_modules/.pnpm/zod@3.22.2/node_modules/zod/lib/types.js:2870:51\n    at processTicksAndRejections (node:internal/process/task_queues:95:5)",
         "issues": {
           "492": {"tag_last_pushed": "Expected string, received null"},
           "493": {"tag_last_pushed": "Expected string, received null"},
           "494": {"tag_last_pushed": "Expected string, received null"},
           "___": "... 6 more"
         }
       }

I think it's best to silently ignore this missing field

[viceice]

what about the digest?

[rarkins]

Digest is more complicated, I'm ok to do that separately

[renovate-release]

🎉 This PR is included in version 36.75.0 🎉

The release is available on:

• GitHub release
• 36.75.0

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