Add SBRPs to enable PVP flow for templating repo

[mthalman]

Adds the following packages:

• NuGet.Common.6.5.0
• NuGet.Configuration.6.5.0
• NuGet.Credentials.6.5.0
• NuGet.Frameworks.6.5.0
• NuGet.Packaging.6.5.0
• NuGet.Protocol.6.5.0
• NuGet.Versioning.6.5.0

This required manual workarounds for dotnet/source-build#3364 and dotnet/sdk#31655.

Contributes to dotnet/source-build#3043

[MichaelSimons]

Is there a reason why templating can't be on the latest version of NuGet?

[mthalman]

Is there a reason why templating can't be on the latest version of NuGet?

Good question. The templating repo currently has the version managed by dependabot: https://github.com/dotnet/templating/blob/985dfbb1fe2e578dd70f5923600093e668e49327/eng/dependabot/Packages.props#L15-L17

It was being overriden by source-build with this configuration: https://github.com/dotnet/templating/blob/985dfbb1fe2e578dd70f5923600093e668e49327/eng/Package.props#L17-L19

But with the PVP changes, those versions don't get applied here, so we're left with the default.

[mthalman]

Closing this in preference to the changes in dotnet/templating#6360.

[mthalman]

Reopening this instead of using the changes in dotnet/templating#6360 because templating requires that preview versions of the NuGet.* packages be available on nuget.org.

[mmitche]

I agree with this. Generally, when I see use of stable package versions, and I know that these aren't being used for functionality in the build or being re-disted (e.g. Microsoft.NET.Compilers.Toolset), I think they are good candidates for SBRP.