fix(popover-container): remove incorrect role attribute - FE-5249

[mkrds]

Proposed behaviour

Fixes #5286

Checklist

• [x] Commits follow our style guide
• [x] Related issues linked in commit messages if required
• [x] Screenshots are included in the PR if useful
• [x] All themes are supported if required
• [x] Unit tests added or updated if required
• [x] Cypress automation tests added or updated if required
• [x] Storybook added or updated if required
• [x] Translations added or updated (including creating or amending translation keys table in storybook) if required
• [x] Typescript d.ts file added or updated if required

QA

• [ ] Tested in CodeSandbox/storybook
• [ ] Add new Cypress test coverage if required
• [ ] Carbon implementation matches Design System/designs
• [ ] UI Tests GitHub check reviewed if required

Testing instructions

The following CodeSandbox is an example of the broken behaviour. You can see the new behaviour by looking at the version in the comment by codesandbox[bot].

[codesandbox-ci[bot]]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 964bfccdcd605c8e59be4b76f05845d2bed8328b:

Sandbox	Source
carbon-quickstart	Configuration
carbon-quickstart-typescript	Configuration
quirky-artem-zqxwrl	PR
delicate-feather-084e6b	Issue #5286

[cypress[bot]]

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Test summary

2912 • 0 • 2 • 0 • 0

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Run details

Project	carbon
Status	Passed
Commit	964bfccdcd
Started	Sep 2, 2022 8:54 AM
Ended	Sep 2, 2022 9:00 AM
Duration	05:48 💡
OS	Linux Debian - 10.10
Browser	Chrome 100

View run in Cypress Dashboard ➡️

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This comment has been generated by cypress-bot as a result of this project's GitHub integration settings. You can manage this integration in this project's settings in the Cypress Dashboard

[harpalsingh]

Using provided codesandbox - https://codesandbox.io/s/runtime-fire-8s58vh - testing using Axe and landmark violation is now not presented therefore passing a11y review which this was fixing.

[carbonci]

:tada: This PR is included in version 110.2.2 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: