polish: use template and interface-ids from codegen

[meiersi-da]

For example TransferFactory.INTERFACE_ID instead of the code in:

ex-java-json-api-bindings/JsonLedgerApiSample/src/main/java/com/example/models/TemplateId.java

Line 26 in 51a9f86

public static final TemplateId TRANSFER_FACTORY_INTERFACE_ID = new TemplateId("#splice-api-token-transfer-instruction-v1", "Splice.Api.Token.TransferInstructionV1", "TransferFactory");