Use binary log in microbuild

This enables the generation of binary logs for our build when running in Microbuild.
Having the logs available helps in post-build debugging of errors. We tend to get a
number of microbuild only failures that are impossible to track down without logging
like this.

Once this is merged i will be adding a task to our VSTS build definition to publish
these post build.

Can now specify "-binaryLog" to Build.cmd and it will produce a binary
log for every invocation of MSBuild. The logs will be written out to the
`Binaries\Logs` directory.

Bump version number to 2.6.1

Avoid depending on sizeof(T) for ExplicitLayout types due to Mono bug

Fixes #23722

Fix for #22690 NRE in GetAttributeSyntaxNodeOfToken

Fixed 'Qualify member access' analyzer for object initializer

Ensure that we make operation callbacks into analyzers for operations within attributes

Fix build failure as AsClauseInternal is not accessible in BasicFeatures.vbproj which also uses the shared VisualBasicAnalyzerDriver project

* removed missing references and p2p transitiveness from project successfully loaded check.

also, now we log skeleton assembly failure reasons to improve those common cases

* fixed test failure due to transitiveness change.

Fixes #23309

Fix System.InvalidOperationException in IOperation factory for an Option statement inside a method body (#23284)

Fixes #23283.

Fix an InvalidCastException in IOperation factory for an ambiguous user-defined short-circuiting operator. (#23238)

Fixes #23232.
Also fixes incorrect calculation of BinaryOperatorKind for the same node.

Fix an InvalidCastException in IOperation factory when a name of a range variable conflicts with another range variable. (#23224)

Fixes #23223.

Fix InvalidCastException in IOperation factory when a user defined conversions involves an integer overflow. (#23206)

Fixes #23203.

Merge master to dev15.5.x

Ensure CodeModel adds elastic trivia when setting names

Fix NullReferenceException thrown while building IOperation node for dynamic object member initializer. (#23162)

Fixes #23154.

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.

Merge master to dev15.5.x

Merge master to dev15.5.x

Compound expressions conversions

* Ensure that we track additional member symbols in the VB binder context and populate the additional field/property symbols initialized by VB AsNew clause that initializes more than one field/property

Note: This change also includes an API change to `IPropertyInitializer` as VB WithEvents declaration with AsNew clause initializer can initialize multiple properties.
Fixes #17813

* Fix wording in some comments

* Address review feedback

* Fix build break

Add IgnoredArguments to IVariableDeclarator.

Update static instance handling

Rewrite IPlaceholderOperation to IConditionalAccessInstanceOperation …

Trivial renames of IOperation API parameter names