Fix weird plural of public method names of EditorDebuggerNode

[adamscott]

I changeds the public method names of:

• EditorDebuggerNode::_method_changeds, and
• EditorDebuggerNode::_property_changeds

to something more relevant:

• EditorDebuggerNode::_methods_changed, and
• EditorDebuggerNode::_properties_changed

[adamscott]

I'm sure @AThousandShips will have a good laugh.

[AThousandShips]

Not sure these need compat methods necessarily, while they are exposed to modules I don't know that we guarantee any compatibility with those and these are only used internally

Otherwise this looks good

[akien-mga]

Yeah the compat methods are not needed, they're only relevant (or even, useful) for methods bound to the scripting API via bind_methods. We don't keep deprecated methods only for modules' sake, as binary compatibility isn't a question (the whole engine needs to be compiled), so the module code can be adjusted.

[Mickeon]

How

[AThousandShips]

English is hard tbh, it's no french but English spelling is weird

[adamscott]

Removed the compatibility methods!

[akien-mga]

Thanks!