[FIX] grap_qweb_report : make xlsx purchase working if there are many supplierinfo for the same products

[legalsylvain]

https://erp.grap.coop/web#id=1037&action=2148&active_id=4&model=project.task&view_type=form&menu_id=1673

[codecov]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (4191956) 78.69% compared to head (d21d0f9) 78.51%.

Files	Patch %	Lines
grap_qweb_report/models/product_product.py	50.00%	7 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             12.0     #347      +/-   ##
==========================================
- Coverage   78.69%   78.51%   -0.18%     
==========================================
  Files         220      221       +1     
  Lines        2469     2486      +17     
  Branches      433      440       +7     
==========================================
+ Hits         1943     1952       +9     
- Misses        495      502       +7     
- Partials       31       32       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[legalsylvain]

MeP du 17/12

/ocabot merge patch

[github-grap-bot]

Hey, thanks for contributing! Proceeding to merge this for you.
Prepared branch 12.0-ocabot-merge-pr-347-by-legalsylvain-bump-patch, awaiting test results.

[github-grap-bot]

Congratulations, your PR was merged at 7bbe5af. Thanks a lot for contributing to grap. ❤️