* Prepare to ship fcs 39.0.0-preview-

* feedback

* Update Versions.props

Oops bad merge

* add check for system assemblies completion

* add check for system assemblies completion

* add check for system assemblies completion

* merge issues

* add FCS release definition links

* Fix FSC nuget package dependencies.  Use FSharp.Org tool Icon as package icon. (#10588)

* src/fsharp/DotNetFrameworkDependencies.fs

* System.Config

* version

* Update bframework refencing (#10502)

* Fix release notes link

* temp (#10506)
Co-authored-by: NDon Syme <donsyme@fastmail.com>
Co-authored-by: NBrett V. Forsgren <brettfo@microsoft.com>

Back off part of #10422 because version numbers are hard and if we do need to service this, we'll have to pull in more substantial changes.

* :Increase package version

* Update gpio test

[main] Update dependencies from dotnet/arcade


 - retain stable SDK

* remove myget restore sources

* add public feed url

* Nuget package + release notes

* feedback

* Added IL verification to new framework; Make IL verification work on linux/mac

* Do not dispose process, to successfully capture stderr, add timeout

* merge

* no pack

* Use package switch

* xlf + csharp_analysis

* feedback

* xlf

* fix build.sh

* Net Standard 2.0 only FSharp.Core (#9801)

* Net standard only FSharp.Core

* temp

* Cherry-pick of FSharp.Core netstandard + fix for netcoreapp3.1 tests

* Fixed netcoreapp30 -> netcoreapp31 test references

* Cleaned up projects, added testplatform package, moved some tests to new suite

* Tests changes

* Revert accidental revert

* Added missing tests

* Cleaned up packages, fixed tests

* Add System.Runtime to references
Co-authored-by: NKevin Ransom (msft) <codecutter@hotmail.com>

* Yeet fx_reshaped_msbuild

* Update fcs build

* Update version

* Update Versions.props

* Update Versions.props

* Remove FSharp.Data.TypeProviders from vs

* Update src/fsharp/FSharp.Build/Microsoft.FSharp.Targets
Co-Authored-By: NPhillip Carter <pcarter@fastmail.com>
Co-authored-by: NPhillip Carter <pcarter@fastmail.com>

* Update Build.ps1

* Update MsbuildOverallVersion to 16.4

* fix versions

* Added ItemKey.fsi/fsi. Added blank SemanticClassification.fs/fsi.

* Raise disposed exception

* Re-worked semantic classification. Renamed ItemKeyReader to ItemKeyStore. Exposing ItemKeyStore/Builder

* Fixing build

* Storing semantic classification

* Caching semantic classification

* Wiring it up

* Need to fix lexing

* Added experimental lexing API to handle find all refs syntactic classification from allocating a lot

* Added System.Memory

* Using Span to check equality without allocating

* Allocate less

* Fixing build. Reducing more allocations and not using lex filter on lexing tokens.

* Remove langversion

* Fixed record find all refs

* Fixing test

* Partial match for active pattern

* Feedback changes

* Added comment on TcResolutionsExtensions

* Creating view accessor when needed in ItemKey. Fixed UnionCase find all refs.

* Added comment on warning

* Added Range.comparer. Moving opens to top of file

* More feedback changes

* Added comment on sliding expiration

* cross-platform wrapper around memory-backed memorymappedfile creation

* reenable FCS tests on non-windows platforms

* publish test results on non-windows platforms

* ensure correct .net sdk versions are installed regardless of VM image preloads

* simple workaround for missing mscorlib versions to TFMs

* publish per-framework xml results and report them in AZDO

* rework mono fixes to use ByteArrayMemory directly

* move runningOnMono call to bytes.fs and patch up callsites

* revert to build-only on mono-containing platforms

another MR will be required to fix the underlying logic before those can be changed to run tests again

* trigger ci

* Using ArrayPool

* Remove open

* Changed some style nits

* Clear arrays

* Update msbuild version

* conflicts