Issue number: resolves #internal

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## What is the current behavior?
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Currently, if you use keyboard navigation to move between dual range
slider knobs, only the first knob you navigate to is highlighted. This
is because both elements in the same component are marked as focusable
and the code that manages focusable doesn't take into account multiple
elements in the same component.


https://github.com/user-attachments/assets/36d84eed-6928-446e-becd-ffa2a97e3cc2

## What is the new behavior?
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this PR. -->

After these changes, we manage focusing on dual knob range sliders
manually, so using tab navigation through dual knob range sliders
focuses knobs as expected.

## Does this introduce a breaking change?

- [ ] Yes
- [X] No

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## Other information

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screenshots of how the component looks before and after the change. -->

[Test - Range - Basic
screen](https://ionic-framework-git-fw-6401-ionic1.vercel.app/src/components/range/test/basic)