Reduce dependencies

Port DisposeAnalyzers to release/dev16.2-preview2

Additionally, we do not mark the package reference to in Features.csproj as PrivateAsset as this leads to the assembly not getting included in the Features NuGet package and causes Omnisharp's analyzer execution to throw missing dependency assembly load errors.
Also update ExpectedDependency in DevDivInsertionFiles.csproj

Fix false positive inside catch clause (port of https://github.com/dotnet/roslyn-analyzers/pull/2501)

Address PR feedback: remove static cache, make FlowAnalysis utilities assembly load lazy and revert reference add to the FlowAnalysis assembly in Workspaces (only referenced in Features now).

(DisposableFieldsShouldBeDisposed)

We will now flag disposable creations in methods that do not escape the
method body (return value, out/ref params, assign to field/property, add
to collection, etc.). Additionally, we also flag disposable fields of
disposable types that are not disposed in the type's Dispose method.
Ported analyzers share the core dataflow analysis computation with the
analyzers in the roslyn-analyzers repo
(Microsoft.CodeAnalysis.FlowAnalysis.Utilities). This PR does not add
any code fixes. We already have a code
refactoring that offers wrapping a disposable creation within a using
statement. I am hoping to extend that to handle more cases and also
possibly convert it to a code fix in follow-up PR(s).

Merge release/dev16.2-preview1 to release/dev16.2-preview2

Merge release/dev16.1 to release/dev16.2-preview1

Ensure unimplemented interface members are reported even in presence …

Merge release/dev16.2-preview1 to release/dev16.2-preview2

* Infer nested nullability for implicitly typed deconstruction variable:
- When the left hand side is 'var', re-infer the type from the visited right hand side
- Update and add tests

Fix some bugs in the project system shims that impact ASP.NET Projects

Merge release/dev16.1 to release/dev16.2-preview1

Use 'x is object' instead of '!(x is null)' or 'x != null'

* Allow nullable variance for in/out params when converting method group to delegate

* Fix diagnostic messages for mismatched out parameter nullable variance

* Improve delegate in parameter variance tests

* Add IdentityConversion_DelegateInParameter test

When some web projects are created, ICSInputSet.SetOutputFileName is
called with a non-absolute path. We should throw these away rather
than set VisualStudioProject.IntermediateOutputFilePath since they're
just placeholders and don't really mean anything.

I totally forgot to do this, but in practice it was hard to observe
because of https://github.com/dotnet/roslyn/issues/35372. That bug
meant that a later project creation would end up re-running the
subscription to the IVsSolution, which also checked the UIContext
and that implicitly set _solutionLoaded. Once that bug was fixed
this problem was now observable.

* Property thread through cancellation through a bunch of our RPC services.

* Tokens

* Fix

* Revert

- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19272.13

Add Generate Parameter Code Fix

* include exception type in CommonObjectFormatter for scripting/interactive

* fixed tests

Two issues:
1) Replace AfterTargets="Build" with BeforeTargets="AfterBuild"
   Workaround for https://github.com/microsoft/msbuild/issues/3345
2) System.ValueTuple
   Seems like the System.ValueTuple package is missing lib/net472/_._, so lib/net47/System.ValueTuple.dll is identified as a runtime dependency although it is not.

Get FullPath and deduplicate potential editorconfig files

Support re-abstraction of interface members in derived interfaces

Do not suggest converting from using-statement to using-local form if it would cause a variable collision.

Make importing constructors public to fix RS0034 (Exported parts should have ImportingConstructor)

Update SuggestedAction to track successful application

Bump the 16.1 version for future servicing releases