[FIX] Fix failing tests on Python 3.11.8 on Windows

[PrimozGodec]

Issue

Recently, some tests started to fail on Windows. The issue is that Actions upgraded the Python 3.11 version to 3.11.8, which was released two weeks ago. The issue is caused by openpyxl and is fixed here: https://foss.heptapod.net/openpyxl/openpyxl/-/merge_requests/436.

Description of changes

Since it seems it will take a long for openpyxl to make a release I am making a temporary (ugly) patch here. This method is a copy of the fixed method from openpyxl).

Includes

• Code changes
• Tests
• Documentation

[CLAassistant]

All committers have signed the CLA.

[PrimozGodec]

It seems that closing is not working in openpyxl as it worked in older versions of Python. I reported it: https://foss.heptapod.net/openpyxl/openpyxl/-/issues/2149
Will try to continue debugging next week.

[codecov]

Codecov Report

Merging #6737 (c2b75b7) into master (ba951fa) will decrease coverage by 0.04%.
The diff coverage is 58.02%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6737      +/-   ##
==========================================
- Coverage   88.13%   88.10%   -0.04%     
==========================================
  Files         322      323       +1     
  Lines       70589    70670      +81     
==========================================
+ Hits        62216    62264      +48     
- Misses       8373     8406      +33     

[PrimozGodec]

/rebase

[markotoplak]

Here, you monkey patch ExcelReader. Does this code need to be in Orange.__init__? I know it will be removed, but I'd at least put this into a new file. Then, I'd import it with try catch.

If possible, I'd also rather import it where the reader is implemented (of course, it that does not work, forget it).

[PrimozGodec]

@markotoplak, I changed it such that it is patched on the place it is used. :)