Add linker step to remove calls to Console.WriteLine

[rolfbjarne]

The System.Console assembly is quite expensive size-wise, so an idea might be to add a linker step that can replace calls to Console.WriteLine (and other related Console functions) with nops.

This could be extended to take a user-provided list of functions to replace with nops (this should be fairly trivial to implement if we decided that these functions must be void functions with no ref/out/pointer arguments).

In the particular case for Console.WriteLine, we could have a few modes:

• Disabled.
• Detect & warn.
• Detect & remove (for instance for release builds).

Ref: dotnet/maui#11405