GH-112290
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Validate extension JSON: Error: Field 'builtin_classes/PackedByteArray/methods/duplicate': is_const changed value in new API, from false to true.
Validate extension JSON: Error: Field 'builtin_classes/PackedColorArray/methods/duplicate': is_const changed value in new API, from false to true.
Validate extension JSON: Error: Field 'builtin_classes/PackedFloat32Array/methods/duplicate': is_const changed value in new API, from false to true.
Validate extension JSON: Error: Field 'builtin_classes/PackedFloat64Array/methods/duplicate': is_const changed value in new API, from false to true.
Validate extension JSON: Error: Field 'builtin_classes/PackedInt32Array/methods/duplicate': is_const changed value in new API, from false to true.
Validate extension JSON: Error: Field 'builtin_classes/PackedInt64Array/methods/duplicate': is_const changed value in new API, from false to true.
Validate extension JSON: Error: Field 'builtin_classes/PackedStringArray/methods/duplicate': is_const changed value in new API, from false to true.
Validate extension JSON: Error: Field 'builtin_classes/PackedVector2Array/methods/duplicate': is_const changed value in new API, from false to true.
Validate extension JSON: Error: Field 'builtin_classes/PackedVector3Array/methods/duplicate': is_const changed value in new API, from false to true.
Validate extension JSON: Error: Field 'builtin_classes/PackedVector4Array/methods/duplicate': is_const changed value in new API, from false to true.

Duplicate method made const. Compatibility methods registered.
