Fix 'missing resource' alert not showing on Home page for missing quiz resources

[LianaHarris360]

Summary

This pr fixes the 'missing resource' alert not displaying on the Homepage if quiz resources have been removed from the device.

• Adds function _map_contentnodes() to map exam and lesson node ids using the same approach
• Updates how missing resources for exams are checked within LearnerClassroomViewset

References

Fixes #11453

Reviewer guidance

1. Set up a full facility and a learn-only device.
2. Assign a quiz to the learner on the LOD.
3. Sign in as the learner and delete some of the quiz resources by going to Device > Channel.
4. Go to the learner's home page and confirm the alert 'Some resources are missing or not supported..' is shown.

missingresourcealert.mp4

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Testing checklist

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Critical and brittle code paths are covered by unit tests

PR process

• PR has the correct target branch and milestone
• PR has 'needs review' or 'work-in-progress' label
• If PR is ready for review, a reviewer has been added. (Don't use 'Assignees')
• If this is an important user-facing change, PR or related issue has a 'changelog' label
• If this includes an internal dependency change, a link to the diff is provided

Reviewer checklist

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[github-actions]

Build Artifacts

Asset type	Download link
PEX file	kolibri-0.16.1.dev0_git.20240322173949.pex
Windows Installer (EXE)	kolibri-0.16.1.dev0+git.20240322173949-unsigned.exe
Debian Package	kolibri_0.16.1.dev0+git.20240322173949-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.16.1.dev0+git.20240322173949-0.4.0.dmg
Android Package (APK)	kolibri-0.16.1.dev0+git.20240322173949-0.1.0-debug.apk
TAR file	kolibri-0.16.1.dev0+git.20240322173949.tar.gz
WHL file	kolibri-0.16.1.dev0+git.20240322173949-py2.py3-none-any.whl

[pcenov]

Thanks @LianaHarris360 - no issues observed while manually testing. This is working correctly now.

[rtibbles]

I think there are a couple of things to clean up here, but makes sense overall!

[rtibbles]

We can shortcut the evaluation here (so it's parallel to the previous any) by breaking out of the loop in this case.

So could change this to:

            for question_source in exam["question_sources"]:
                if question_source["exercise_id"] not in contentnode_map:
                    missing_resource = True
                    break

Note also the slightly more idiomatic not in syntax rather than negating an in expression.

[LianaHarris360]

Right, when the contentnode_map doesn't contain the exercise_id of one question, the missing_resource will continue to be false. So no need to check every exam question!

[rtibbles]

Looks good to me, and @pcenov says it works, so we have the green light!