Fix hierarchy actor creation menu target resolution

[Gopmyc]

Description

This PR fixes the actor target used by the Hierarchy panel creation menu.

ActorCreationMenu::GenerateActorCreationMenu now receives m_targetActor directly instead of GetTargetActor(), ensuring the creation action consistently uses the current hierarchy target actor context.

Related Issue(s)

Fixes #799

Review Guidance

• Open the Hierarchy panel.
• Trigger the actor creation menu from different hierarchy contexts.
• Verify the created actor is associated with the expected target actor context.

Screenshots/GIFs

N/A

AI Usage Disclosure

Debug

Checklist

• My code follows the project's code style guidelines
• When applicable, I have commented my code, particularly in hard-to-understand areas
• When applicable, I have updated the documentation accordingly
• My changes don't generate new warnings or errors
• I have reviewed and take responsibility for all code in this PR (including any AI-assisted contributions)

[Gopmyc]

I'm working on fixing that for Linux

[adriengivry]

I'm working on fixing that for Linux

Nothing to be fixed, looks like a GitHub internal error. I'll restart the build.

[Gopmyc]

I'm working on fixing that for Linux

Nothing to be fixed, looks like a GitHub internal error. I'll restart the build.

I was thinking that too, it’s weird that it doesn’t work on both sides

[adriengivry]

I'm working on fixing that for Linux

Nothing to be fixed, looks like a GitHub internal error. I'll restart the build.

I was thinking that too, it’s weird that it doesn’t work on both sides

It's a server error. GitHub has been struggling lately, not surprised that build pipelines are failing for no reason.