Package validation fails to load dependencies uniquely in baseline version

### Describe the bug

When `EnablePackageValidation` is `true` and `PackageValidationBaselineVersion` is set to a prior released version, and the prior version has a dependency that the new version does not have, this text is written to the build log:

> Could not resolve reference 'MessagePack.dll' directly or transitively referenced by 'lib/net472/Microsoft.VisualStudio.Composition.dll' (D:\a\_work\_temp\.nuget\packages\microsoft.visualstudio.composition\17.13.41\microsoft.visualstudio.composition.17.13.41.nupkg) in any of the provided search directories.

Aside: This message isn't reported as a warning or an error, and has no diagnostic code. IMO this should be corrected. As such, it appears in a console log without an ability to be suppressed.

The real issue though is that this assembly _should_ be resolvable. But I suspect it is not because the search directories given by the task's msbuild caller only include paths to _current_ package dependencies instead of including prior package dependencies.

### To Reproduce

```
git clone git@github.com:microsoft/vs-mef.git
cd vs-mef
git checkout f9e8de31de8265cda3f51a28225fe15311dfc89e
dotnet pack -bl
```

Open the binlog and search for `messagepack.dll not(nerdbank.messagepack.dll)`.
You might also see it on the console, but in my testing it only shows up on the console when run within Azure Pipelines.

### Further technical details
details of dotnet --info

.NET SDK:
Version: 10.0.100
Commit: b0f34d51fc
Workload version: 10.0.100-manifests.5fb86115
MSBuild version: 18.0.2+b0f34d51f

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26200
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\10.0.100\

.NET workloads installed:
There are no installed workloads to display.
Configured to use workload sets when installing new manifests.
No workload sets are installed. Run "dotnet workload restore" to install a workload set.

Host:
Version: 10.0.0
Architecture: x64
Commit: b0f34d51fc

.NET SDKs installed:
9.0.205 [C:\Program Files\dotnet\sdk]
9.0.307 [C:\Program Files\dotnet\sdk]
9.0.308 [C:\Program Files\dotnet\sdk]
10.0.100 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.22 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.21 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.22 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.21 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.22 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 9.0.11 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 10.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
DOTNET_CLI_DISABLE_PUBLISH_AND_PACK_RELEASE [true]
DOTNET_SUGGEST_SCRIPT_VERSION [1.0.2]

global.json file:
E:\src\vs-mef\global.json

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download