[mono] Investigate enabling `CanEmitObjectArrayDelegate` to respect `DynamicCodeSupport` feature switch in `System.Linq.Expressions` library

[ivanpovazan]

Based on discussion in: #87924 investigate performance and size impact of enabling

runtime/src/libraries/System.Linq.Expressions/src/System/Dynamic/Utils/DelegateHelpers.cs

Line 16 in 4415472

internal static bool CanEmitObjectArrayDelegate => true;

to respect DynamicCodeSupport feature switch setting, ie:

internal static bool CanEmitObjectArrayDelegate => RuntimeFeature.IsDynamicCodeSupported;;

This means that in AOT mode the property becomes: CanEmitObjectArrayDelegate=false and in order to support this setting Mono would have to implement a private CoreLib API which:

• creates a strongly typed Delegate (e.g. Func<int, int>) that boxes all it's arguments
• puts the arguments into an array
• dispatches to a Func<object?[], object?> delegate to do the actual work, and finally
• unboxes the result

References: comment1 and comment2.

This would also align how System.Linq.Expressions is supported in other AOT compilers - NativeAOT.