Fix fcall include handling with context-aware meta parsing

[pvcresin]

This PR fixes scenario/known-issues/fcall-include.rb.

The known issue was this kind of code:

class C
  def include(x)
    x
  end

  def check
    include(1)
  end
end

TypeProf incorrectly treated include(1) as meta include in this context, so type inference became too loose.

Details

This PR fixes it by changing AST parsing:

• Receiver-less include / attr_reader / attr_accessor are treated as meta only at class/module top level.
• Calls in method bodies are parsed as normal method calls.

After this change:

• The old known issue is moved to scenario/regressions/fcall-include.rb.
• The scenario now passes as a regression test.

[mame]

Neat solution!