Version `0.2.0-beta-000080` only exists on my local system; we actually want version `0.2.0-beta-000081` which is publicly available.

The standard `GenerateSatelliteAssemblies` target that ships with MSBuild uses al.exe (alink) to create satellite assemblies. However, there are a couple of things it doesn't support that we need in the dotnet/roslyn repo--see issues #23190 and #23191 for details. Instead, we want to use the `CoreGenerateSatelliteAssemblies` target from Microsoft.NET.Sdk. We've already opted in to that target, and now we need to opt out of the original `GenerateSatelliteAssemblies`. Until we can move to a copy of MSBuild that includes the change in https://github.com/Microsoft/msbuild/pull/2726 the best way to do that is to redefine the target as a no-op.

1. Add the XliffTasks package for all projects.
2. Automatically update XLF files during build on dev machines.
3. Opt-in to the .NET Core satellite assembly generation task.
4. Turn off localization for non-shipping projects by default.
5. Work around an issue in locale-neutral CTO generation.

Fix unexpected EndProject line in Roslyn.sln

Several small bug fixes related to readonly references.

* added search to Roslyn option page.

* don't implicitly and with previous result.

Merge dev15.5.x into master

Emitting `foreach` over `Span` and `ReadOnlySpan` as a `for` loop

Making sure that "in" matches exactly in method group conversions.

use full duplex stream

Quick fix for signing failures

Related to #14592

Move us to SDK 2.2.0 preview

Remove background compiler from TestWorkspace

Reverts the change to use the PortableStrongNameProvider and
switches us back to using the COM-based signing provider.

Avoid allocations in IsDefinedInSourceTree hot paths

Nullable reference types in C# Proposal Link

Move assert outside loop

Need to be on 15.4 in order for the .NET core workload to bring along
the 2.0.0 runtime.

The .NET Core workload brings down the shared runtime component. That is
needed when our core clr tests are run.

Enable execution of well known batch fixer from non-VS host

The abscence of the 2.0.0 shared runtime seems to be the cause of our
CoreClr based suite failures. Hard coding the download of the runtime to
verify this is the case. Will work on a better fix after it's verified.

Fixes #23462

This reverts commit c24e51ef.

Stop publishing VSIXes that don't exist anymore

Assignments can be ref or regular, but there's no such thing as a
"ref-readonly" assignment or "out" assignment, only left-hand sides that
can be ref-kind. Changing to IsRef prevents bugs around looking for the
RefKind of the assignment instead of looking for the RefKind of the LHS.