[Bug]: Un-necessary #label-container in the DOM for label-visibility="none"

### Code of conduct

- [X] I agree to follow this project's code of conduct.

### Impacted component(s)

Slider

### Expected behavior

When user sets `label-visibility=none` on `sp-slider` the element with id `label-container` should not be in the DOM. This is causing the sp-slider to move up with a custom label outside the shadowroot of slider.

### Actual behavior

If `label-visibility=none` then we should not render `

### Screenshots

UI issue on slider. Slider track is moving up.

### What browsers are you seeing the problem in?

_No response_

### How can we reproduce this issue?

1. Go to https://opensource.adobe.com/spectrum-web-components/storybook/index.html?path=/story/slider--no-visible-labels
2. Open dev tools
3. See `

### Sample code that illustrates the problem

```
private renderLabel(): TemplateResult {
const textLabelVisible =
this.labelVisibility === 'none' || this.labelVisibility === 'value';
const valueLabelVisible =
this.labelVisibility === 'none' || this.labelVisibility === 'text';
return html`

```

### Logs taken while reproducing problem

_No response_

Start with the Slider component's renderLabel() implementation shown in the issue and reproduce the no-visible-labels Storybook example. Verify that setting label-visibility="none" removes label-container from the DOM and that the slider track no longer moves upward.

Written by the indexing model from the issue text.