Follow up to #21603. See #21603 (comment) for context.
Once arrow-rs allows determining whether a FileDecryptionProperties instance uses a KeyRetriever (apache/arrow-rs#9721), the conversion from FileDecryptionProperties to ConfigFileDecryptionProperties should be updated to fail when a key retriever is used, rather than relying on getting an error when retrieving the footer key.
Follow up to #21603. See #21603 (comment) for context.
Once arrow-rs allows determining whether a
FileDecryptionPropertiesinstance uses aKeyRetriever(apache/arrow-rs#9721), the conversion fromFileDecryptionPropertiestoConfigFileDecryptionPropertiesshould be updated to fail when a key retriever is used, rather than relying on getting an error when retrieving the footer key.