Handling attempt to upload a project after reaching the project limit

[VitorVieiraZ]

When attempting to upload a local only project, if the workspace project limit has been reached, the project is now removed from the synchronization pending list and is completely deleted if the project is removed by the user.

PR_3450.mov

Fixes #3403

[github-actions]

Pull Request Test Coverage Report for Build 9223917265

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 49 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.06%) to 60.047%

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Files with Coverage Reduction	New Missed Lines	%
input/app/attributes/attributecontroller.cpp	1	77.37%
input/app/synchronizationmanager.cpp	48	60.0%

Totals
Change from base Build 9161804447:	0.06%
Covered Lines:	7674
Relevant Lines:	12780

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💛 - Coveralls

[tomasMizera]

Do we know why the project is not valid in the first place? Can you check that please?

[tomasMizera]

Just a small comment, otherwise looks good to me!