https://www.ibm.com/docs/en/epfz/6.1.0?topic=SSY2V3_6.1/lr/lsh-sha2final.htm
SHA2FINAL224, SHA2FINAL256, SHA2FINAL384, and SHA2FINAL512
Use a token initialized by the corresponding SHA2INIT function to complete a SHA-2 hash of a series of texts and return a CHAR string with that hash value.