Expand Invalid RID Error Messages

[TokisanGames]

Differentiates error messages between null, invalid RIDs and those that are not found when calling the free() functions in Visual, Physics, and Navigation Servers.

Addresses @lawnjelly 's comments:
#55764 (comment)

Perhaps if the message "Invalid RID" is now being used for a NULL RID with the first check, these messages at the end could be something like "RID not found."? 🤔

That might be handy to differentiate the two cases (although I doubt this later case will happen often).

and
#64199 (comment)

The other problem as I mentioned in the PR, is that this error message does not distinguish between a NULL RID and a RID not found.

@akien-mga

[lawnjelly]

What do these error messages look like out of interest?

I'm just wondering if we go to the length of writing the server type in the message, maybe it makes sense to disambiguate e.g. BulletPhysicsServer from GodotPhysicsServer, etc.

I suspect the error message currently does show the source file in the Godot IDE, but imo if we are going to show this info in the error message itself, it is kind of strange to not show as much as possible. So I would be tempted to either go with "Invalid RID" and "RID not found" and rely on the file / function info, or write the whole caboodle in the message. 🤔

[TokisanGames]

It already shows bullet, sw, 2D, etc in the code line.

ERROR: VisualServer attempted to free an invalid RID.
   at: (servers/visual/visual_server_raster.cpp:69)

Remember users, who only know about physics server and visual server, and not the individual types will also see these messages. Invalid RID is quite cryptic, and a lot less information than VisualServer attempted to free an invalid RID, which is what happened.

I can change it to whatever is directed.

[lawnjelly]

OK, agree.

I'm also wondering whether "attempted to free a NULL RID" might be more informative. 🤔

Although the c++ code uses "valid", it's kind of vague term, it could mean corrupt or outdated or anything. Whereas this is specifically for a RID that has not been allocated, or has been set to NULL.

[TokisanGames]

OK, I'll change it to null.

[TokisanGames]

The messages have been updated with NULL RID.

[lawnjelly]

Looks great! Sorry for delay was away for weekend.

[clayjohn]

Thanks!