[2.x] Refactor CookiesTexts config keys

Problem/Motivation

Currently, some cookies.texts config keys are very vaguely describing their use case. Some examples are "settings" and "acceptAll" both these config keys describe cookies banner button labels. That use case can't be seen by simple looking at the config key name.

Furthermore, some config keys seem to be duplicates, example: "acceptAll" and "allowAll".

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes