lib/uklibparam: `UK_LIBPARAM_PARAM_ALIAS()`,`UK_LIBPARAM_PARAM_ARR_ALIAS()`

lib/uklibparam: `UK_LIBPARAM_PARAM_ALIAS()`,`UK_LIBPARAM_PARAM_ARR_ALIAS()`

This commit provides `UK_LIBPARAM_PARAM_ALIAS()` and
`UK_LIBPARAM_PARAM_ARR_ALIAS()` which are variants of `UK_LIBPARAM_PARAM()`
and `UK_LIBPARAM_PARAM_ARR()`. These registration macros allow to set a
custom parameter name instead of deriving it from the variable name.

Signed-off-by: Simon Kuenzer <simon@unikraft.io>
Reviewed-by: Delia Pavel <delia_maria.pavel@stud.acs.upb.ro>
Approved-by: Razvan Deaconescu <razvand@unikraft.io>
Tested-by: Unikraft CI <monkey@unikraft.io>
GitHub-Closes: #868