Merge master to unmanaged constructed type feature branch

* Add unmanaged generic struct tests

* Don't bail out of managed type checks when type arguments are present

* Simplify test

* Delegate HasPointerType to underlying field in WrappedFieldSymbol

* Add test for recursive expansion of struct with T : unmanaged

* Delay constraint checking on field types until after type members are added

* Update comment

* Add expected diagnostic to UnmanagedRecursiveTypeArgument test

* Add unmanaged recursive type argument tests with constraint violations

* Don't search fields whose type is circular struct when determining if a type is managed

* Update some tests

* Use TypeSyntax.Location for Type.CheckAllConstraints

* Add prototype comment

* Update GenericConstraintsTests

* Update IsManagedType asserts in UnsafeTests

* Fix ManagedAddressOfTests.DisallowSizeof

* Use SourceMemberFieldSymbol.SyntaxNode.Location for consistency in diagnostics

* Add some tests and diagnostics

* Fix more tests

* Fix BaseClassTests

* Add test for partially constructed generic struct which violates unmanaged constraint

* Consider nullability when running AfterTypeMembersChecks

* Update NullableReferenceTypesTests.Constraint_Oblivious due to differences from delayed constraint checks on field types

* Check if NRT enabled in compilation to use correct nullability in constraint checks

* Make UnmanagedConstraint_StructMismatchInImplements behave consistently

* Disable ResourceTests.AddResourceToModule in Mono

* Remove prototype comment

* Remove invalid comments from UnmanagedConstraints_NestedInGenericType

* Use ErrorLocation instead of SyntaxNode.Location

* Rename our pipeline YAML files

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

* Fix tests now that we use ErrorLocation for field constraint checks

Also replaces some unsafe code with Span<T>.

output paths are not specifically affecting semantics of code but some analyzer such as source based test discovery requires it to generate correct data. so they want to be re-analyzed when those are changed as well.

since output path are rarely get changed. decide to add it as one of cause to reanalyze projects.

Add a new SuppressMessageAttribute target scope to suppress diagnosti…

Merge dev16.0.x to dev16.0-preview2

Merge pull request #31125 from jasonmalinowski/fix-metadata-reference-conversion-to-languages-without-compilations

Block conversion of references to F# projects from C# projects

Fixes #30561

Add IVTs to 16.0 version of RemoteLS

This was a policy we previously had in place, but I accidentally deleted
the tests covering it in 2d86a7b6.

Fix 'else without if' parsing - better error message

put internal API partner team is using (FSharp) back

* Add sdkPath option to CSharp

* Simplify sdkPath test in CSharp

* Add tests for VisualBasic sdkPath switch

* Add MSBuild FrameworkPathOverride property to CSharp based on VisualBasic precedent

* Add Vbc SdkPath switch test

* Add WorkItem tags to CommandLineTests.cs

* Add /sdkPath- switch

* Add tests for multiple /sdkPath arguments

* Remove extra blank line from CommandLineTests.vb

* Update command line doc

* Add /sdkPath- and tests to VisualBasic

* Update C# and VB compiler help

* Remove /sdkPath:<file> switch from CSharp

* Update doc

* Update Csc task and test

* sdkpath- -> nosdkpath

* Add DisableSdkPath property to VB targets

* Update tests

* Add NoSdkPath tests which attempt to reference System.dll

* Disable ResourceTests.AddResourceToModule in Mono

* Only run DestructorTests.BaseTypeHasNonVirtualFinalize on WindowsDesktop

Pull up check in indentation code, and remove the need for nullable.

* origin/master: (174 commits)
  Add Compilers filter for Roslyn (#30880)
  Remove NonNullTypes context and other unnecessary information stored in TypeSymbolWithAnnotations. (#30913)
  Update BoundCall method based on receiver nullability (#31000)
  Make nullabiulity inference associative and commutative (#30990)
  Async-streams: minimal test for IOperation and CFG. Improve diagnostics (#30363)
  Add src.
  Add test.
  Remove dead code
  Update the build status table
  Script for generating our build status tables
  Add parsing tests to compiler benchmarks (#31033)
  Fix Edit and Continue in CPS projects
  Add comment
  Sorting.
  Save work
  Address PR feedback
  only produce optprof data on an official build
  Add bunch of exclusions to dead code analysis for special methods
  Disable WinRT tests on Linux (#31026)
  Change prerelease version to beta2 (#31017)
  ...

# Conflicts:
#	src/Compilers/CSharp/Portable/CSharpResources.resx
#	src/Compilers/CSharp/Portable/Errors/ErrorCode.cs

Merge dev16.0.x to dev16.0-preview2