Revert "Beforecompile"

[vzarytovskii]

Reverts #17057, it breaks plain build:

FSC : error FS0193: The module/namespace 'Microsoft.FSharp.Core' from compilation unit 'FSharp.Core' did not contain the namespace, module or type 'int64' [/Users/runner/work/1/s/src/FSharp.Core/FSharp.Core.fsproj::TargetFramework=netstandard2.0]
FSC : error FS0193: The module/namespace 'Microsoft.FSharp.Core' from compilation unit 'FSharp.Core' did not contain the namespace, module or type 'string' [/Users/runner/work/1/s/src/FSharp.Core/FSharp.Core.fsproj::TargetFramework=netstandard2.0]
FSC : error FS0193: The module/namespace 'Microsoft.FSharp.Core' from compilation unit 'FSharp.Core' did not contain the namespace, module or type 'int64' [/Users/runner/work/1/s/src/FSharp.Core/FSharp.Core.fsproj::TargetFramework=netstandard2.0]
FSC : error FS0193: The module/namespace 'Microsoft.FSharp.Core' from compilation unit 'FSharp.Core' did not contain the namespace, module or type 'string' [/Users/runner/work/1/s/src/FSharp.Core/FSharp.Core.fsproj::TargetFramework=netstandard2.0]
FSC : error FS0193: The module/namespace 'Microsoft.FSharp.Core' from compilation unit 'FSharp.Core' did not contain the namespace, module or type 'int64' [/Users/runner/work/1/s/src/FSharp.Core/FSharp.Core.fsproj::TargetFramework=netstandard2.0]
FSC : error FS0193: The module/namespace 'Microsoft.FSharp.Core' from compilation unit 'FSharp.Core' did not contain the namespace, module or type 'string' [/Users/runner/work/1/s/src/FSharp.Core/FSharp.Core.fsproj::TargetFramework=netstandard2.0]
FSC : error FS0193: The module/namespace 'Microsoft.FSharp.Core' from compilation unit 'FSharp.Core' did not contain the namespace, module or type 'int64' [/Users/runner/work/1/s/src/FSharp.Core/FSharp.Core.fsproj::TargetFramework=netstandard2.0]
FSC : error FS0193: The module/namespace 'Microsoft.FSharp.Core' from compilation unit 'FSharp.Core' did not contain the namespace, module or type 'string' [/Users/runner/work/1/s/src/FSharp.Core/FSharp.Core.fsproj::TargetFramework=netstandard2.0]
 

https://dev.azure.com/dnceng-public/public/_build/results?buildId=657428&view=logs&j=21ffccb3-dd24-5c7d-bf5b-5230b6605867&t=15059643-aeb2-5260-2074-e0b8d6154b00

It blocks most external maintainers (myself as well, since I use plain build).

[github-actions]

⚠️ Release notes required, but author opted out

Warning

Author opted out of release notes, check is disabled for this pull request.
cc @dotnet/fsharp-team-msft

[vzarytovskii]

Something must've changed in ordering, since it seems prelude is not compiled first anymore.