GH-75759
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Validate extension JSON: Error: Hash changed for 'classes/AnimationNode/methods/blend_input', from 5162412C to A178F700. This means that the function has changed and no compatibility function was provided.
Validate extension JSON: Error: Hash changed for 'classes/AnimationNode/methods/blend_node', from 1263CBA5 to 0FB30106. This means that the function has changed and no compatibility function was provided.
Validate extension JSON: Error: Field 'classes/AnimationNode/methods/_process/arguments': size changed value in new API, from 3 to 4.
Validate extension JSON: Error: Field 'classes/AnimationNode/methods/blend_input/arguments': size changed value in new API, from 7 to 8.
Validate extension JSON: Error: Field 'classes/AnimationNode/methods/blend_node/arguments': size changed value in new API, from 8 to 9.

`_process`: Added a parameter to a virtual method.
`blend_input`, `blend_node`: Added an optional parameter with a default value. No adjustments should be necessary.
