Delete resource from everywhere when force_delete is selected

[thesujai]

Summary

1. Whenever force_delete is selected, the ContentNodes with same content_id is appended to the node_ids so the content can be deleted from everywhere
2. Adds a validate method to DeleteChannelValidator so force_delete wont be ignored in the validation process

References

Fixes #12606

Reviewer guidance

Try and replicate this, if it doesn't replicate then we are good to go.

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Testing checklist

• [x] 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

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• [ ] PR has 'needs review' or 'work-in-progress' label
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• [ ] 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

• 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[bot]]

Build Artifacts

Asset type	Download link
PEX file	kolibri-0.17.3a0.dev0_git.22.g62a70edb.pex
Windows Installer (EXE)	kolibri-0.17.3a0.dev0+git.22.g62a70edb-windows-setup-unsigned.exe
Debian Package	kolibri_0.17.3a0.dev0+git.22.g62a70edb-0ubuntu1_all.deb
Mac Installer (DMG)	kolibri-0.17.3a0.dev0+git.22.g62a70edb.dmg
Android Package (APK)	kolibri-0.17.3a0.dev0+git.22.g62a70edb-0.1.4-debug.apk
TAR file	kolibri-0.17.3a0.dev0+git.22.g62a70edb.tar.gz
WHL file	kolibri-0.17.3a0.dev0+git.22.g62a70edb-py2.py3-none-any.whl

[rtibbles]

Just did a quick retarget and rebase, as this is aimed at 0.17 planned patch 2. Will merge once the build completes.