Windows: support versionless package names

[scpeters]

Part of #1244, needed to fix CI in gazebosim/gz-sim#2726.

While testing a gazebo package name without the major version in gazebosim/gz-sim#2726, the Windows build fails when trying to find a package with matching name in the colcon workspace. The last message is:

# BEGIN SECTION: Update package gz-sim10 from gz to ignition
Packages in workspace:
gz-cmake4
gz-common6
gz-fuel_tools10
gz-gui10
gz-math8
gz-msgs11
gz-physics8
gz-plugin3
gz-rendering9
gz-sensors9
gz-sim
gz-tools2
gz-transport14
gz-utils3
sdformat15
Failed to find package ignition-gazebo10 in workspace.
Failed with error #1.

The code currently checks for gz-packageN then ignition-packageN. This PR adds an additional step in between, so that it checks for gz-packageN, then gz-package, then ignition-packageN.

I started a test jobs of ignition-utils1 and gz-utils3 with this branch to confirm that it doesn't break existing jobs:

• https://build.osrfoundation.org/view/gz-fortress/job/gz_utils-ign-utils1-win/101/
• https://build.osrfoundation.org/job/gz_utils-3-win/46/