chore(build): output in logs the list of Windows images and tags to be processed

[lemeurherve]

This PR outputs the list of Windows images and tags to be processed in the logs, ex:

= PREPARE: List of images and tags to be processed:
{
  "jdk17-windowsservercore-ltsc2019": {
    "Tags": [
      "jdk17-windowsservercore-ltsc2019",
      "3131.vf2b_b_798b_ce99-1-jdk17-windowsservercore-ltsc2019"
    ]
  },
  "jdk11-windowsservercore-ltsc2019": {
    "Tags": [
      "jdk11-windowsservercore-ltsc2019",
      "3131.vf2b_b_798b_ce99-1-jdk11-windowsservercore-ltsc2019",
      "windowsservercore-ltsc2019"
    ]
  },
  "jdk17-nanoserver-1809": {
    "Tags": [
      "jdk17-nanoserver-1809",
      "3131.vf2b_b_798b_ce99-1-jdk17-nanoserver-1809",
    ]
  },
  "jdk11-nanoserver-1809": {
    "Tags": [
      "jdk11-nanoserver-1809",
      "3131.vf2b_b_798b_ce99-1-jdk11-nanoserver-1809",
      "nanoserver-1809",
    ]
  }
}

Testing done

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