Install zlib on Windows GA CI

The weekly package build is broken and also the CI builds apparently by a GS Windows image update which enabled zlib which was not there before.

Xref #5766

The comment here has some details and analysis: https://github.com/DynamoRIO/dynamorio/pull/5766#issuecomment-1328029559

The broken package build from this week: https://github.com/DynamoRIO/dynamorio/actions/runs/3551887463/jobs/5966427587

Dr. Memory's package build is also broken: https://github.com/DynamoRIO/drmemory/actions/runs/3551911682/jobs/5966473881