Publish Ngen logs separately

Consume the new IMethodSymbol.Construct overload that takes nullability

Merge release/dev16.3-preview2 to master

Adding Skip to CSharpInteractiveCommands.VerifyPreviousAndNextHistory

https://github.com/dotnet/roslyn/issues/18779

Formatting updates for C# 8

The type inferrer does method type inferrence if we know what the
return type of the method should be. This triggered if the method was
handled an argument which it could then chase up and find the
InvocationExpressionSyntax. Unfortunately if you are inferring and
don't have an argument you still want to be able to infer the type
of the argument if there was one there, but there's no ArgumentSyntax
to work from. Thus, it's easier to just directly pass the
InvocationExpressionSyntax and avoid the tree walk; looking through
the callers of InferTypeInArgument there's only one place where
it could potentially find an InvocationExpressionSyntax, and that one
place is the place I updated the call site on.

Move comment to correct line of code

The NGEN log files are published inside our "Build Diagnostic Logs"
container today. That is regularly around 160MB in size of which the
NGEN logs take up ~700K.

Been working on some automation / processing that is specific to NGEN
log files. Downloading the other 159MB is fairly wasteful and slow for
this automation. Publishing the NGEN files separately so I can make this
automation more effecient.

Merge release/dev16.2 to release/dev16.3-preview2

Update LanguageServices dependencies

Merge release/dev16.3-preview2 to master

UseExpressionBody cleanup

Update signing cert used for EE.ResultProvider - 16.3 P2

Update signing cert used for EE.ResultProvider - 16.3 P3

Add tests for RefaHelpers with empty Attributes / empty decls. 

Merge release/dev16.3-preview2 into master

Skip BasicEditAndContinue integration tests that are failing

* Cleanup

* Optimize memory allocation of LCS algorithm

Merge pull request #37594 from jasonmalinowski/add-nullable-annotations-to-speculative-model-creation

Add nullable annotations to speculative model creation and update code for bug found

Merge release/dev16.3-preview1 to master

Update some skip attributes on TypeInferrer tests

Consume the new compiler API for comparing symbols without nullability

Fix using statements to use correct copy of PooledObjects

Fix trailing whitespace and superfluous blank lines in generated GlobalSuppressions.cs

Add an integration test for #37623

* EE: Do not trim comments from expression preceding a quote