[Elements - Styles Pane]: Fixing SR behavior for element state pane
[Elements - Styles Pane]: Fixing SR behavior for element state pane

Element State Pane: https://imgur.com/u6O3im1

Issue:
- Forced element state checkboxes use a table element for layout purposes
- SR is announcing the checkbox container as a table which can cause confusion to SR users

Changes:
- Set the role for the table element as "presentation"

Usage of "role=presentation":
The presentation role is used to remove semantic meaning from an element and any of its related child elements. For example, a table used for layout purposes could have the presentation role applied to the table element to remove any semantic meaning from the table element and any of its table related children elements, such as table headers and table data elements. Non-table related elements should retain their semantic meaning, however.
https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/ARIA_Techniques/Using_the_presentation_role

Bug: 1065913
Change-Id: I24d7b2b8fccc7983a574ddd8d385e8f15e79b90d
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2127671
Reviewed-by: Robert Paveza <7787129de3d0cb4911c68d958db3023863584560@microsoft.com>
Reviewed-by: Songtao Xia <efb39a3e57dd0e7c4fd137171d5e7a3f041d1da6@microsoft.com>
Commit-Queue: Michael Liao <00d75d81082fdf74688ec453c516b42f7cbf0f40@microsoft.com>

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