On folder move execute only one UPDATE query for all nested items.

[allexzander]

So, the idea here is to not execute INSERT query for every nested item of moved folder (there can be thousands of items and this is very very slow and also brings an issue of user moving/renaming the same folder multiple times, causing local database records to become messed up and virtual files being removed on a later sync). Instead, the UPDATE query is executed, which is very fast. Tested on 1000 files so far so good.
Let's keep it draft for now until I have time to properly finalize it.

Should fix #4636 or at least make it much less likely to happen.

[sonarcloud]

SonarCloud Quality Gate failed.   

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83.5% Coverage
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[sonarcloud]

Quality Gate failed

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2 Security Hotspots
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[sonarcloud]

Quality Gate failed

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2 Security Hotspots
C Maintainability Rating on New Code (required ≥ A)
74 New Code Smells (required ≤ 0)

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[nextcloud-desktop-bot]

AppImage file: nextcloud-PR-6211-2a7adfe766f6258e420c2b51dee79447684c40c2-x86_64.AppImage

To test this change/fix you can simply download above AppImage file and test it.

Please make sure to quit your existing Nextcloud app and backup your data.

[sonarcloud]

Quality Gate failed

Failed conditions
2 Security Hotspots
C Maintainability Rating on New Code (required ≥ A)
81 New Code Smells (required ≤ 0)

See analysis details on SonarCloud

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