Fix dotnet build VisualFSharp.sln

[majocha]

Description

Running dotnet build VisualFSharp.sln fails with error:

error MSB3823: Non-string resources require the property GenerateResourceUsePreserializedResources to be set to true.

So let's set it to true and see it anything breaks.

Should fix #18886.

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cc @dotnet/fsharp-team-msft

[majocha]

I see it didn't work in general, this breaks another things (VSSDK1012: The cto merger could not read the data) Maybe copilot can make it conditional, but I doubt.

[majocha]

After some begging alternated with threats of violence, Copilot came up with something that works. I managed to build VisualFSharp.sln in Rider with this:

This probably won't work directly from a clean repo, though.
Also this needs a double check if all the resources are still embedded correctly in the vsix.

[majocha]

Now, this is very incompatible with BUILDING_USING_DOTNET env variable.
So, in a clean repo you need to at least build bootstrap first:

git clean -xdf -e .vs -e .dotnet

dotnet publish .\proto.proj -c Proto

then this should work from Rider and from commandline

dotnet build .\VisualFSharp.sln

as a bonus, now the msbuildengine switch works again:

.\Build.cmd -msbuildengine dotnet

[auduchinok]

@majocha Thank you very much for investigating and fixing it!