Change to Paket.Restore.targets breaks restore for Paket 5.174.0

Description

Performing a build with Paket 5.174.0 of .NET Standard 2.0 projects resulted in an updated Paket.Restore.targets file. This update includes the section below from PR https://github.com/fsprojects/Paket/pull/3273.

true

This stops the package restore on build when using Paket 5.174.0 and breaks all future builds for .NET Standard / Core projects which require a package restore to get their references.

Repro steps

Please provide the steps required to reproduce the problem

1. Create a new .NET Standard project with Paket 5.174.0

2. Add packages using Paket 5.174.0

3. Build

4. Check NuGet references

If possible then please create a git repository with a repro sample or attach a zip to the issue.

Expected behavior

The NuGet references should be visible in VS and usable in code.

Actual behavior

Build breaks with missing references and NuGet packages are not visible.

Known workarounds

Downgrade to Paket 5.173.4.

Start by comparing the Paket.Restore.targets section introduced by PR 3273 with the behavior of Paket 5.174.0 and 5.173.4. Reproduce the problem in a .NET Standard 2.0 project, build it, and verify whether NuGet references appear in Visual Studio and are usable in code; done means restore no longer breaks on build.