Refactoring the following command:
https://pnp.github.io/cli-microsoft365/cmd/spo/listitem/listitem-roleassignment-remove

Related to #4531.

Requirements

• Refactor to a listitem util function.
• Take explicit care to add intelligible errors when dependant objects aren't found. (such as the user when --upn is used)