Fixes https://devdiv.visualstudio.com/DevDiv/_workitems/edit/512823

In VB Code Model, we use SyntaxFactory.ParseTypeName/ParseName when
setting the name of an attribute or namespace. Doing this fails to add
elastic trivia the way it is added in all other cases, so setting the
name of a namespace (for example) would remove the newline, creating
broken code. To fix this, we now manually add elastic trivia in these
cases.

C# was already functioning correctly, but it was using
".IdentifierName()" to parse dotted names, which isn't advised. This
change also updates the C# side accordingly.

This shows our informational version in Help > About instead of a
useless ProductID GUID.

Fixes dotnet/roslyn#17038.

Fixes #22244
Related to #22406

We don't need the split anymore now that we're only supporting Dev15.

Unfortunately this required the introduction of a NuGet package that
has a namespace "Workspace" to our VS project, which meant I had to
disambiguate Workspace wherever it's used in that layer. I considered
doing an extern alias instead to disambiguate, but applying that to a
ProjectReference isn't supported. That's tracked by NuGet/Home#4989.

Better error reporting for VsLanguageDebugInfo

* Rename Foo to Goo

* Rename ifoo to igoo

* Add back BOMs

In the new SDK we no longer have a need for ProjectGuid. This change
will:

- Remove ProjectGuid from project files
- Remove Name + Project items from ProjectReference entries
- Change BuildBoss to enforce both of these items

Migrated the remainder of our code base to use the new SDK via the
ConvertPackageRef tool.

https://github.com/jaredpar/ConvertPackageRef

Enable few more rules and fix issues identified these rules.

Also added issue IDs for the disabled rules due to lack of a fixer/fix all experience.

This is an automated migration of our project files to the new SDK /
PackageReference.  It is done using the tool located here:

https://github.com/jaredpar/ConvertPackageRef