Add method check for _notify_skeleton_bones_renamed.

[SaracenOne]

Adds check for existence of _notify_skeleton_bones_renamed method when walking nodes in PostImportPluginSkeletonRenamer. Silences errors and closes #83148

[akien-mga]

Did you see this alternative PR? #83149

Also an alternative to both, or to combine wih #83149: Why not cast to BoneAttachment3D instead of Node, and do a proper method call instead of string based?

[SaracenOne]

Hmm, I didn't actually. It's somewhat hard to say which is a more appropriate fix. Hypothetically with this approach, you could allow other nodes which could consume this event, but honestly, I think checking for BoneAttachment3D would be fine since this is just one relatively bespoke notification event. If we changed this to a cast, even though it's exclusively an editor only thing, we could also remove an extra method bind I guess.

[akien-mga]

I think a cast and removing the unnecessary binding would be better. BTW the current cast to Node seems redundant since the elements of the TypedArray are Nodes already.

[SaracenOne]

Okay, I've modified it now to remove the bind, and use casting instead. I didn't put the change @dpalais made in case you want to merge that seperately, though I can put it in mine too if you'd prefer this all be one PR. It's not strictly nessecary, but it results in less looping and feels like good practice.

[akien-mga]

Minor nitpicks, but looks good to me otherwise.

[SaracenOne]

Oh, I could have sworn I put the include in the right order. I think my IDE did something strange. Anyway, it's resolved now.

[SaracenOne]

Oh, another minor thing I missed: got rid of the redunant vargs since we don't need them anymore.

[akien-mga]

Thanks!