[AOT/Trim Support] ObservableRecipient.IsActive does not work

### Describe the bug

i always use ObservableRecipient and its IsActive property, now it seems that does not support AOT/Trim.

Solution:
i created a new property for this:
[ObservableProperty]
public bool isProcessActive;


### Regression

CommunityToolkit.Mvvm 8.3.2

### Steps to reproduce

1. Use ObservableRecipient and IsActive property
2. Run app with PublishTrimmed and AOT

### Expected behavior

Support AOT/Trim

### Screenshots

_No response_

### IDE and version

VS 2022

### IDE version

_No response_

### Nuget packages

- [ ] CommunityToolkit.Common
- [ ] CommunityToolkit.Diagnostics
- [ ] CommunityToolkit.HighPerformance
- [x] CommunityToolkit.Mvvm (aka MVVM Toolkit)

### Nuget package version(s)

8.3.2

### Additional context

_No response_

### Help us help you

No, just wanted to report this