[QA] Check and add the API test coverage for updating with empty content/file

[saw-jan]

Check and add API test coverage for these bug reports

Related issues:

• can't edit a file to have no content #7115, Trying to overwrite a file with an empty file causes an error #7257 (updating file with empty content)
• [oCIS] Cannot sync file to the server when content is updated to empty content #8003 (replacing file with empty file)

Similar scenarios:

• Scenario Outline: upload an empty file with mtime
• Scenario Outline: upload an empty file with mtime in a folder
• upload an empty file (size zero byte) to a shared folder

Confirm tests coverage for:

• Update file with empty content
  • [tests-only][full-ci] added test to update a file with empty content #8088
  • [tests-only][full-ci] added issue tag @issue-7257 on added scenarios #8093
• Replace file with empty file (TUS upload) [tests-only][full-ci] Extend API test coverage for replacing file with zero-byte file via TUS upload #8105