fix: preserve deprecated, readOnly, writeOnly when normalizing OAS 3.1 array schemas

The OpenAPINormalizer.processNormalize31Spec method converts OAS 3.1
JsonSchema array types into legacy ArraySchema objects, but was not
copying the deprecated, readOnly, or writeOnly flags during conversion.
This caused @deprecated annotations to be silently dropped for array-type
properties in all generators when processing OAS 3.1 specs.

Author: plaflamme

modules/openapi-generator/src/main/java/org/openapitools/codegen/OpenAPINormalizer.java

@@ -1839,6 +1839,9 @@ protected Schema processNormalize31Spec(Schema schema, Set<Schema> visitedSchema
                 as.setXml(schema.getXml());
                 as.setNullable(schema.getNullable());
                 as.setUniqueItems(schema.getUniqueItems());
+                as.setDeprecated(schema.getDeprecated());
+                as.setReadOnly(schema.getReadOnly());
+                as.setWriteOnly(schema.getWriteOnly());
                 if (schema.getItems() != null) {
                     // `items` is also a json schema
                     if (StringUtils.isNotEmpty(schema.getItems().get$ref())) {