DataTable Yaml representers and constructors

[augustearth]

The pre-existing code was throwing errors due to global tags. Had to adopt the approach found here

https://stackoverflow.com/questions/76717530/global-tag-is-not-allowed-exception-in-snakeyaml-2-0

to allow all tags. Not safe.

[augustearth]

Some relevant snakeyaml links:

https://stackoverflow.com/questions/35106218/how-to-make-snakeyaml-and-gstrings-work-together https://stackoverflow.com/questions/52619452/snakeyaml-unable-to-find-property-error https://stackoverflow.com/questions/76717530/global-tag-is-not-allowed-exception-in-snakeyaml-2-0