Invoke in ElementUtil and ElementProxy cause unnecessary delegate allocations

_I might bundle this up with some Dispatcher improvements to support generic invocations at least for internal use, so it would be a bigger PR. We will see, won't be right away._

### Description

The `Invoke` method from `ElementUtil` is causing unnecessary allocations due to the attempt to catch exceptions from another thread (if invoked on) and re-throw on the current thread. This further comes the from already allocating delegates inside `ElementProxy` that use this `Invoke` exclusively.

### Showcase


### Repro

Note: This repro is specifically crafted to highlight an issue like this.

https://github.com/h3xds1nz/UIAPerformancePitfalls