FastUpToDate broken with GeneratePackageOnBuild+SuggestedBindingRedirects

`GenerateBindingRedirects` is always executed due to `SuggestedBindingRedirects` not being a file.
This doesn't work well with `GeneratePackageOnBuild` since this target is called again during `Pack` and changing `.config` file timestamp.

# Steps to reproduce

Project file
```xml

Exe
netcoreapp3.1
true

```

Run build in VS multiple times.
UpToDate check fails with:
```
1>FastUpToDate: Checking copied output (UpToDateCheckBuilt with Original property) file 'C:\Users\xen\source\repos\ConsoleAppFUTD\ConsoleAppFUTD\obj\Debug\netcoreapp3.1\ConsoleAppFUTD.dll.config': (ConsoleAppFUTD)
1>FastUpToDate: Source 2020-06-05 11:49:36: 'C:\Users\xen\source\repos\ConsoleAppFUTD\ConsoleAppFUTD\obj\Debug\netcoreapp3.1\ConsoleAppFUTD.dll.config'. (ConsoleAppFUTD)
1>FastUpToDate: Destination 2020-06-05 11:49:35: 'C:\Users\xen\source\repos\ConsoleAppFUTD\ConsoleAppFUTD\bin\Debug\netcoreapp3.1\ConsoleAppFUTD.dll.config'. (ConsoleAppFUTD)
```

### Investigation

`GenerateBindingRedirects` is run a second time during Pack step:


The `.config` file is being written a second time in the `obj` folder **after** having it's been copied from `obj` the `bin` folder during the previous `Build` step. This results in wrong timestamps for next build/fast-up-to-date check.

It can't even be skipped because the `GenerateBindingRedirects` target contains `SuggestedBindingRedirects` in its list of `Target.Inputs`, and those items are assemblynames instead of files. As a result, the target Inputs/Outputs check will **always** fail.

https://github.com/microsoft/msbuild/blob/dc485bce3427e9d2b020ce61c2400e7b5a76062c/src/Tasks/Microsoft.Common.CurrentVersion.targets#L2194

### Expected behavior

FastUpToDate check work and build is skipped

### Actual behavior

FastUpToDate check doesn't work

### Environment data
`msbuild /version` output:

OS info: Windows 10

If applicable, version of the tool that invokes MSBuild (Visual Studio, dotnet CLI, etc):
Visual Studio 16.6.0