Rename acrylic resources

[YuliKl]

Describe the bug

With #3498 we added and updated acrylic resources. Now it's time to change the names of these resources to better align with other new colors/brushes that are being checked in.

I would like to see the following changes:

Current resource name	New name
SystemControlBaseAcrylicBrush	AcrylicBackgroundFillColorBaseBrush
SystemControlTransientBackgroundBrush	AcrylicBackgroundFillColorDefaultBrush
SystemControlTransientAcrylicElementBrush	AcrylicInAppFillColorDefaultBrush
SystemControlTransientBackgroundInverseBrush	AcrylicBackgroundFillColorDefaultInverseBrush

Control styles that use the old names (in particular SystemControlTransientBackgroundBrush and SystemControlTransientAcrylicElementBrush) will also need to be updated.

Additional context

Copied from internal task

[YuliKl]

@chingucoding FYI, just in case you would be interested in tackling this work.

[marcelwgn]

Sure, I'll work on this.

[mdtauk]

Is this for the main branch, or for the Design Tokens one?

[marcelwgn]

I would assume for the main branch but Yulia knows more than me here.