Merge from internal

NuGet.config

eng/Version.Details.xml

eng/Versions.props

...ataProtection/src/Repositories/FileSystemXmlRepository.cs

...tection/test/Repositories/FileSystemXmlRepositoryTests.cs

src/Http/WebUtilities/src/FileBufferingReadStream.cs

src/Http/WebUtilities/src/FileBufferingWriteStream.cs

src/Http/WebUtilities/test/FileBufferingReadStreamTests.cs

src/Http/WebUtilities/test/FileBufferingWriteStreamTests.cs

src/Shared/CertificateGeneration/CertificateManager.cs

...ols/FirstRunCertGenerator/test/CertificateManagerTests.cs

src/Tools/dotnet-user-secrets/src/Internal/SecretsStore.cs

src/Tools/dotnet-user-secrets/src/Program.cs

src/Tools/dotnet-user-secrets/test/SecretManagerTests.cs