fix(flat-table): fix cut outline of selected row - FE-5036

[mkrds]

FYI: Due to Safari limitations it has been decided that this issue won't be fixed on Safari

Proposed behaviour

Fixes #4968

Current behaviour

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

Additional context

Testing instructions

https://codesandbox.io/s/carbon-quickstart-forked-re0vr8

[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 8f5d09e302be0af885bc1805c9e929ab383b11fd:

Sandbox	Source
carbon-quickstart	Configuration
carbon-quickstart-typescript	Configuration
carbon-quickstart (forked)	PR
mutable-cookies-thelly	Issue #4968
admiring-mccarthy-bppsp3	Issue #4968

[cypress[bot]]

---

Test summary

2731 • 0 • 2 • 0 • 0

---

Run details

Project	carbon
Status	Passed
Commit	8f5d09e302
Started	Aug 16, 2022 10:37 AM
Ended	Aug 16, 2022 10:43 AM
Duration	06:07 💡
OS	Linux Debian - 10.10
Browser	Chrome 100

View run in Cypress Dashboard ➡️

---

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

[carbonci]

:tada: This PR is included in version 110.0.2 :tada:

The release is available on:

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

Your semantic-release bot :package::rocket: