Query Builder: disabled inputs should be empty

[imincheva]

Issue

Steps to reproduce

1. Start with an empty query.
2. Create a new group by clicking and/or group button
3. Select ID column
4. Select filter, which supports value, e.g. contains
5. Type in value e.g. 123
6. Change the selected filter to filter, which doesn't support value, e.g. Empty

Result The "Value" input text still says 123.

Expected result The input text from "Value" input should be removed and the input should be empty.

Originally posted by @imincheva in https://github.com/IgniteUI/igniteui-angular/issues/14647#issuecomment-2396350789