rpk: cluster config get doesn't handle aliases

[JFlath]

Version & Environment

Redpanda version: (use rpk version):

Tested on 24.1.13

What went wrong?

Unable to get certain properties such as data_transforms_per_core_memory_reservation with their aliased names (in this case, wasm_per_core_memory_reservation)

What should have happened instead?

get operations should be able to use the alias.

How to reproduce the issue?

$ rpk cluster config set wasm_per_core_memory_reservation=123456789
Successfully updated configuration. New configuration version is 3.

Cluster needs to be restarted. See more details with 'rpk cluster config status'.

$ rpk cluster config get  wasm_per_core_memory_reservation
Property 'wasm_per_core_memory_reservation' not found

$ rpk cluster config get  data_transforms_per_core_memory_reservation
123456789

Additional information

This is a little difficult, as get CONFIG_NAME in rpk actually gets the whole config and then searches that, so would likely require some Core changes to include the aliases somehow in the result.

JIRA Link: CORE-6757