Fix CallComposite captions to correctly be <li> items

[JamesBurnside]

What

• Update location of ul to be the parent of the captions
• Update the captions parent-most element to be an li

Why

A11y bug.

More details:

Actual result:
The Live Captions region within the call UI contains an incorrectly structured list. The list has direct child elements that are not valid. Instead of containing only <li> (list item) elements, it currently contains <div> elements

Expected result: 
Ensures that lists are structured correctly (list - https://accessibilityinsights.io/info-examples/web/list)

The Live Captions region should contain only <li> elements as direct children of the <ul> element

Element path: 
.css-113

Snippet: 
<ul class="ms-FocusZone css-490 css-113" data-ui-id="captions-banner" data-tabster="{&quot;uncontrolled&quot;: {}}" data-focuszone-id="FocusZone4727">

How Tested

verified locally:

verified spoken language RTL working:

[github-actions]

Failed to pass the composite UI Test. If this PR is for UI change and the error is snapshot mismatch, please add "update_snapshots" label to the PR for updating the snapshot.

[github-actions]

Storybook 8 URL https://60c7ae6891f0e90039d7cd54-dnfluelxwi.chromatic.com/

[github-actions]

@azure/communication-react jest test coverage for beta.

	Lines	Statements	Functions	Branches
Base	54198 / 89406 60.62%	54198 / 89406 60.62%	1102 / 2522 43.69%	3203 / 5336 60.02%
Current	54220 / 89416 60.63%	54220 / 89416 60.63%	1102 / 2522 43.69%	3213 / 5337 60.2%
Diff	22 / 10 0.01%	22 / 10 0.01%	0 / 0 0%	10 / 1 0.18%

[github-actions]

@azure/communication-react jest test coverage for stable.

	Lines	Statements	Functions	Branches
Base	26873 / 43376 61.95%	26873 / 43376 61.95%	734 / 1350 54.37%	2160 / 3445 62.69%
Current	26877 / 43387 61.94%	26877 / 43387 61.94%	734 / 1350 54.37%	2152 / 3438 62.59%
Diff	4 / 11 -0.01%	4 / 11 -0.01%	0 / 0 0%	-8 / -7 -0.1%

[github-actions]

Failed to pass the UI Test. If this PR is for UI change and the error is snapshot mismatch, please add "update_snapshots" label to the PR for updating the snapshot.

[github-actions]

Storybook 8 URL https://60c7ae6891f0e90039d7cd54-khpakduikg.chromatic.com/

[github-actions]

Storybook 8 URL https://60c7ae6891f0e90039d7cd54-umnasacyvq.chromatic.com/

[github-actions]

Chat bundle size is not changed.

• Current size: 1758915
• Base size: 1758915
• Diff size: 0

[github-actions]

Calling bundle size is not changed.

• Current size: 8139366
• Base size: 8139366
• Diff size: 0

[github-actions]

CallWithChat bundle size is not changed.

• Current size: 8139379
• Base size: 8139379
• Diff size: 0

[github-actions]

Storybook 8 URL https://60c7ae6891f0e90039d7cd54-nugmlicrje.chromatic.com/