This commit adds a new method to the Node class to set arguments.
Partial backport of Core [[https://github.com/bitcoin/bitcoin/pull/16714 | PR16714]] - part 1 of 5
Commit [[https://github.com/bitcoin/bitcoin/pull/16714/commits/1bccf6a52d7fc08d8f605cfb2edc3277ec299c72 | 1bccf6a52d7fc08d8f605cfb2edc3277ec299c72]]