fix: toggle checkbox on selection column cell Space key

[web-padawan]

Description

Fixes #7146

This PR changes the behavior of vaadin-grid-selection-column (and will also apply to its Flow version) like this:

• Pressing Space on the selection column cell toggles the checkbox regardless of autoSelect property,
• In interaction mode, Space is handled as previously (added logic to prevent toggling checked twice).

Type of change

• Behavior altering fix

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[vaadin-bot]

Hi @web-padawan and @web-padawan, when i performed cherry-pick to this commit to 24.2, i have encountered the following issue. Can you take a look and pick it manually?
Error Message:
Error: Command failed: git cherry-pick afb3820
error: could not apply afb3820... fix: toggle checkbox on selection column cell Space key (#7178)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

[vaadin-bot]

This ticket/PR has been released with Vaadin 24.4.0.alpha15 and is also targeting the upcoming stable 24.4.0 version.