Remix: soft-delete / restore projects

[ruggi]

Fix #4873

Problem:

The Remix app needs a way to (soft-)delete and restore projects via the projects page.

Fix:

1. Since our database already has a (unused?) deleted column for projects, this PR makes use of it.
2. Added a new route to soft-delete projects which will mark a given project as deleted: true. It only works for non-deleted projects.
3. Added a new route to restore soft-deleted projects, which will mark a given project as deleted: null. It only works for soft-deleted projects.
4. Added unit and integration tests.
5. Updated the existing tests and logic for updating and listing projects so that they only target non-deleted projects.

[github-actions]

Try me

[relativeci]

Job #10374: Bundle Size — 61.73MiB (~-0.01%).

636223b(current) vs d299c8d master#10372(baseline)

Warning

Bundle contains 57 duplicate packages – View duplicate packages

Bundle metrics   2 changes 1 regression

	Current Job #10374	Baseline Job #10372
Initial JS	34.77MiB(~+0.01%)	34.77MiB
Initial CSS	0B	0B
Cache Invalidation	20.46%	85.16%
Chunks	28	28
Assets	32	32
Modules	4294	4294
Duplicate Modules	493	493
Duplicate Code	31.01%	31.01%
Packages	455	455
Duplicate Packages	57	57

Bundle size by type   2 changes 1 regression 1 improvement

	Current Job #10374	Baseline Job #10372
JS	61.72MiB (~+0.01%)	61.72MiB
HTML	11.37KiB (-0.32%)	11.41KiB

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View job #10374 report View feat/remix-delete-project branch activity View project dashboard

[github-actions]

Performance test results: