Autocomplete: optionValue support

[denny99]

Describe the bug

Well the autocomplete with dataKey is broken, as it is no longer implemented at all.

Autocomplete.ts:

    getOptionValue(option) {
        return option; // TODO: The 'optionValue' properties can be added.
    }

There is another line with a todo that the optionValue should be used (instead of this.dataKey).

Environment

Does not matter

Reproducer

No response

Angular version

Does not matter

PrimeNG version

17.3.3

Build / Runtime

Angular CLI App

Language

TypeScript

Node version (for AoT issues node --version)

Does not matter

Browser(s)

No response

Steps to reproduce the behavior

No response

Expected behavior

Should be properly implemented as stated in the TODO

[sandrotonon]

Still an issue in PrimeNG 17.13.0. The component is actually not usable if the options are objects but the value that needs to be stored is not the object itself but, for example, its ID.