breaking: drop Windows 2019 images

[lemeurherve]

This change drops Windows 2019 images.

Refs:

• Drop Windows 2019 controller images #2368
• Drop Windows 2019 support jenkins-infra/helpdesk#4954

Testing done

CI

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[lemeurherve]

A lot of "hcs::CreateComputeSystem <..>: Incorrect function." errors across all builds 😓