feat: ionKnobMoveStart/End expose info on which knob is moving

### Prerequisites

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- [X] I have searched for [existing issues](https://github.com/ionic-team/ionic-framework/issues) that already include this feature request, without success.

### Describe the Feature Request

You can have two knobs on an ion-range, and we have these two new events ionKnobMoveStart and ionKnobMoveEnd, but I can't figure out which knob got moved from the event. Please provide that info in the passed $event or somehow.

### Describe the Use Case

I have different behaviors for the two knobs in the range.

### Describe Preferred Solution

Probably in the range event detail, let us know which knob was moved.

### Describe Alternatives

I could do this with (touchstart) and (touchend), but those don't do the keyboard control, right?

### Related Code

_No response_

### Additional Information

_No response_

Start at the ion-range implementation and the definitions for ionKnobMoveStart and ionKnobMoveEnd. Trace the range event detail to determine how the moving knob can be identified, including keyboard interaction. Done means both events expose which knob moved while retaining the existing range behavior.

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