[EUI] Fix temporary selectable horizontal card workaround

[cee-chen]

Summary

closes #145508

This workaround was added in 7832378. A non-temporary fix was pushed up in 8.7 (#144845), but rather than create a new EUI backport just for this issue, I'm opting to fix the 8.6-only workaround.

Before

After

Checklist

• Any UI touched in this PR is usable by keyboard only (learn more about keyboard accessibility)
• This renders correctly on smaller devices using a responsive layout. (You can test this in your browser)
• This was checked for cross-browser compatibility

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 9cfe1db

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
canvas	1.0MB	1.0MB	+2.0B
securitySolution	9.7MB	9.7MB	+12.0B
total			+14.0B

Unknown metric groups

ESLint disabled in files

id	before	after	diff
osquery	1	2	+1

ESLint disabled line counts

id	before	after	diff
enterpriseSearch	19	21	+2
fleet	59	65	+6
osquery	108	113	+5
securitySolution	442	448	+6
total			+19

Total ESLint disabled count

id	before	after	diff
enterpriseSearch	20	22	+2
fleet	67	73	+6
osquery	109	115	+6
securitySolution	519	525	+6
total			+20

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[vitaliidm]

LGTM
Thanks