Remove `<CreateMsymManifest/>` MSBuild task and `$(MonoSymbolArchive)` property

[jonathanpeppers]

Android framework version

net10.0-android (Preview)

Affected platform version

.NET 10

Description

Context:

• Replacement for mono-symbolicate runtime#106395
• Packaging & redistribution of mdoc.exe & mono-symbolicate in a .NET 6 world? runtime#35852

mono-symbolicate and *.msym files were never implemented for .NET 6+. There would likely be a completely different, modern solution if we did have a replacement

We can remove the following, which are leftover from Xamarin.Android:

• <CreateMsymManifest/> MSBuild task
• The $(MonoSymbolArchive) MSBuild property
• Any MSBuild targets that check Condition=" '$(MonoSymbolArchive)' == 'True' ", we can just remove.
• Any tests related to mono-symbolicate or msym files

Steps to Reproduce

n/a

Did you find any workaround?

No response

Relevant log output