Prefab Focus Mode: Component Trees Can Not be Expanded and Collapsed

[LesaelR]

Describe the bug Tree views are disabled on components of read-only entities.

Pre-requisites

1. Procedural Prefabs are enabled in AutomatedTesting\user\Registry\editorpreferences.setreg:

{
    "Amazon": {
        "Preferences": {
            "EnablePrefabSystem": true,
            "EnablePrefabSystemWipFeatures": true
        }
    },
    "O3DE": {
        "Preferences": {
            "Prefabs": {
                "SaveAllPrefabs": "Ask every time",
                "UseProceduralPrefabs": true
            }
        }
    }
}

Steps to reproduce

1. Launch the Editor and open a new or existing level.
2. Instantiate any .procprefab into the Entity Outliner.
3. Enter Focus Mode on the .procprefab, and select a read-only entity.
4. In the Entity Inspector, expand the mesh component
5. Attempt to interact with the Mesh Stats LoD tree within the mesh component

Expected behavior Tree views are not disabled on components of read-only entities.

Actual behavior Tree views are disabled on components of read-only entities.

Screenshots/Video

Found in Branch development@a8a96d3e66853fdd

[AMZN-daimini]

On components cards, we actually had to implement a "fake disabled state" to allow the expander to still work on disabled components. Not sure if we can do something similar on the RPE though.

Also relates to this: https://github.com/o3de/o3de/issues/6346