fix: lua FText param handling

[localcc]

Description

Fixes FText param handling in Hooks/etc.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Tested by using RegisterHook on a sample project, then reading the received FText value, as well as replacing the return value.

Checklist

• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• I have added the necessary description of this PR to the changelog, and I have followed the same format as other entries.
• Any dependent changes have been merged and published in downstream modules.