(cherry picked from commit 0a39cf90)

Merge master to release/dev16.3-preview1

Code actions to configure severity and IDE code style options with .editorconfig

Merge release/dev16.2-preview3 to master

Merge master to release/dev16.3-preview1

Merge master to release/dev16.3-preview1

* Add back constructor to ProjectExternalErrorReporter

* Add missing imports to ProjectExternalErrorReporter

Implement code cleanup for documents

#36330 tracks enabling them

⏱ Syntax tree benchmarks

Implement RestrictedInternalsVisibleToAttribute

* Added fsharp shims over document diagnostic analyzers

* Added shims for completion and sig help. Also added tests.

* Moved around internal files. Added shim over InlineRenameService.

* Starting shim over document highlights service. Added a better way to handle diagnostics

* Added shim for document highlights service

* Added IFSharpDocumentNavigationService

* Added IFSharpGoToDefinitionService

* Added IFSharpNavigationBarItemService

* Added IFSharpNavigateToSearchService

* Added extra glyph case

* Added FSharpGlyphTags

* Added FSharpCommentSelectionService

* Some cleanup. Added FSharpBlockStructureService

* Added some simple statics

* Finishing the last of shims

* Getting analyzers to work

* Remove folder

* Changes due to feedback

* Fixing build

* Still trying to fix build

* Fixed guid

* Fixing build again

* Filter out missing import fixes that would add references

* Remove superfluous IsEmpty check

Expose a CodeAction API for groups of nested code actions

See #30165
Fixes https://devdiv.visualstudio.com/DevDiv/_workitems/edit/754127

🧹 Remove IInProcessAnalyzer

🧹 Remove unnecessary locking from GetOrComputeDescriptors

Fix MEF usage in Navigate To test code

IDE benchmarks

🧹 Remove the use of asynchronous APIs in analyzer

🧹 Fix layering issues with embedded languages interfaces

Merge master to release/dev16.3-preview1

* Update publish data for 16.2-preview3 snap

* Update PublishData.json

Pass arguments to StreamJsonRpc as arrays

🐛 Fix incorrect caching of XML documentation comments with/without expandIncludes

Handle missing private metadata from reference assemblies

Avoid captures in SqlConnection.FlushSpecificWritesAsync

* Use ref locals to simplify code flow
* Fix VB code layout

Some reference assemblies omit information about private fields. To
avoid treating structures in these assemblies as immutable, we only
consider types immutable if they contain information about one or more
private fields.

This is a workaround for issues like dotnet/standard#678.