* Arcade SDK 1.0.0-beta.19054.11

* Consolidate OptProf scripts

* Use raw IBC data from VSTS drop

This merge deleted azure-pipelines-official.yml. That is incorrect as
it's a necessary file for the repository. This commit resets it back
to the current state in master.

Bad merge
https://github.com/dotnet/roslyn/commit/34152ac0bacebb920308ca7e2be30cef6f27b4c4

* Remove RuntimeIdentifier specification

* Arcade directory layout

* Move package reference to RoslynTools.ModifyVsixManifest from Tools to VSIX project

RoslynTools.ModifyVsixManifest is used by a build task that executes on Build and thus must be restored when the project is restored, not when the CI tools are restored.

* Move RoslynTools.BuildTasks package reference

* Fix publishing configuration

Originally created when everything was VSTS. This gets us back inline
with the new branding.

Originally created when everything was VSTS. This gets us back inline
with the new branding.

Originally created when everything was VSTS. This gets us back inline
with the new branding.

When the LHS of an operator is a collection then `-ne $null` compares
collection content, not checks for null. Using `$null -ne` instead.

https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_comparison_operators?view=powershell-6

Move Linux build logic to build\scripts\build.sh
Eliminate MicroBuild scripts

* Rename target GetBuildVersion to GetVsixVersion

* Targets refactoring to align with Arcade SDK

* Remove unused property

* Use Arcade VSIX build targets

* Upload Willow VSIXes directly from VSSetup directory

* Add setup packages to Roslyn.sln

* Remove swr validation from BuildBoss

* Avoid copying CoreXT packages

* Don't delete DevDivPackages\Roslyn dir

* Upload vsixes even when the build fails

* Clean up VSIX project files

* Install VSIXes in specified order

* Do not set TargetFrameworkVersion.

* Fix parameter

* DevDivInsertion better error message

* Remove 'win' from target string

* Fix dir name

* Install Setup.Dependencies

* Default values for insertion components

* Make BuildBoss happy

* Fix VSIX path

* NGEN binaries that should have been NGEN'd

* RoboCopy returns non-zero exit code on success

* Pass OfficialBuild property to vsmanproj

* Fix and clean up NuGet package publishing

* Fix path in BuildBoss

* Rename CIBuild to ContinuousIntegrationBuild

* Set OfficialBuildId and ContinuousIntegrationBuild properties

* Set ContinuousIntegrationBuild=true in deterministic build tests

* Remove DeveloperBuild

This copies our VSTS YAML file into dev15.7.x. This changes nothing
about our official build in this branch. It just seeds it with the
correct value and lets the merge bots move it to the rest of the trees.

The official switch over for 15.7 will happen at a later time and will
be very deliberate.

Until Roslyn-Signed-Yaml is renamed to Roslyn-Signed then we need to
hard code Roslyn-Signed instead of using `$(Build.DefinitionName)` in
the YAML file.

The insertion tool relies on the display name of our upload task to be
"Upload VSTS Drop". The build definition to YAML definition omitted this
information and broke the insertion tool.

The 15.6 branch still signs our SWIX projects using Microbuild directly,
not via SignTool. Hence we need to install the plugin as test signed
here while we are still in validation.