3306916 only validate file size on new uploads.

Closes #3306916

added 2266 commits

• cefec951...de85d081 - 2263 commits from branch project:11.x
• 48f96595 - Only validate file size on new uploads.
• 2857482c - Do not simply silence a test
• e0439fa5 - Test that file size is only validated over new files

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closed