[Issue] AC-6678::The button is not usable by keyboard

[m2-assistant]

This issue is automatically created based on existing pull request: #3979: AC-6678::The button is not usable by keyboard

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Description

Environment	https://venia.magento.com/
Testing Method	Observation
Resolution	Desktop
Page	Checkout
Location/Component	Place Order button
Issue description	The button is not usable by keyboard
Additional Note
Criteria Name	2.1.1 Keyboard
Level	A
Impact	Blocker
Category	Visual, Motor, Cognitive
Responsibility	Developer
Fix (YES/NO)	Y
Fix Date

## Related Issue

Closes #AC-6678.

Acceptance

Verification Stakeholders

Specification

Verification Steps

Test scenario(s) for direct fix/feature

Test scenario(s) for any existing impacted features/areas

Test scenario(s) for any Magento Backend Supported Configurations

Is Browser/Device testing needed?

Any ad-hoc/edge case scenarios that need to be considered?

Screenshots / Screen Captures (if appropriate)

Breaking Changes (if any)

Checklist

• I have added tests to cover my changes, if necessary.
• I have added translations for new strings, if necessary.
• I have updated the documentation accordingly, if necessary.

[anthoula]

@adobe export issue to JIRA project PWA as Story

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.adobe.com/browse/PWA-3021 is successfully created for this GitHub issue.