Convert all remaining usages of redux mappings to redux hooks in the plugin-hrm-form project

[stephenhand]

We would like to complete the process of modernising our React code by replacing the remaining usages of state and dispatch mappings with redux hooks.

Limit changes to those required to achieve the above goal, avoid unnecessary refactors, renames etc.

Preserve the usage of the asyncDispatch wrapper in any action dispatching code that is updated.

[stephenhand]

A second PR is required to convert the remaining components