This commit adds support for specifying directories containing a single
project to both the `add reference` and `remove reference` commands.
Fixes issue #7343.
* remove reference to TestAssetsManager in dotnet-add-reference
* remove TestAssetsManager dependency from dotnet-build
* remove TAM ref from dotnet-list-reference
* remove TAM dependency from dotnet-msbuild
* remove TAM dependency from ProjectJsonMigration tests
* remove TAM dependency from dotnet.Tests
* remove TAM dependency from dotnet-new.Tests
* remove TAM from dotnet-pack.Tests
* remove TAM from dotnet-publish.Tests
* remove TAM from dotnet-restore.Tests
* remove TAM dependency from dotnet-remove-reference.Tests
* remove TAM dependency from dotnet-run.Tests
* remove TAM dependency from dotnet-test.Tests
* remove TAM dependency from Microsoft.DotNet.Cli.Utils.Tests
* remove TAM from TestBase
* remove TAM
* remove newly introduced dependency on TAM
* Partial conversion to new3. 2 tests fail due to browserlink not restoring.
* new cache initialization
* More lzma changes, and removed a razor ref from templates
* Ephemeral hive flag added to tests that need it
* Updated the template engine version to build against. Minor code cleanup
* Config changes to make template versions separate from template engine versions
* Changed dotnet new versioning to use Product.Version
* Fixing Archiver.csproj
* Fixing dotnet new test.
* Fix LZMA Package Source Condition
* Workaround for newline differences.
* fixed tests with changed template parameters. Added a new3 template non-match test
