📖 docs: document E2E workaround for kubeflex context issue

[mrhapile]

📝 Summary of Changes

• Documented the temporary E2E test workaround for a kubeflex context-selection issue.
• Explained why kubeflex-specific kubeconfig extensions are removed during E2E test execution.
• Clarified that the workaround is limited to E2E tests and does not affect normal user workflows.
• Related issue: bug: kflex create uses the wrong context kubeflex#597 (tracked via docs issue [Doc Update] 🐛 Add to E2E test a workaround to context bug #512)

Fixes #512

[netlify]

✅ Deploy Preview for kubestellar-docs ready!

Built without sensitive environment variables

Name	Link
🔨 Latest commit	0c3b20e
🔍 Latest deploy log	https://app.netlify.com/projects/kubestellar-docs/deploys/69662d041ab99900089941f4
😎 Deploy Preview	https://deploy-preview-525--kubestellar-docs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[Copilot]

Pull request overview

This PR documents a temporary E2E test workaround for a kubeflex context-selection issue in the CONTRIBUTING.md file. The documentation explains why kubeflex-specific kubeconfig extensions are removed during E2E test execution to ensure reliable test results.

• Added a new section explaining the E2E test context workaround
• Documented the kubeflex context-selection issue and its impact on testing
• Clarified that the workaround only affects E2E tests and not normal user workflows

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[clubanderson]

/retest

[clubanderson]

/retest

[clubanderson]

The Build & Push PR Preview Image and Code Quality & Build workflow failures are due to a cached workflow that has since been disabled (replaced by Netlify previews).

Please rebase your branch on main or merge main into your branch to pick up the workflow changes:

git fetch origin main
git rebase origin/main
git push --force-with-lease

This will stop the failing workflows from running.

[kubestellar-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign kproche for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[mrhapile]

@clubanderson I have rebased my branch