ci: fix installation in setup & flaky tests (backport #1254)

[mergify]

This is an automatic backport of pull request #1254 done by Mergify.

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[codecov-commenter]

Codecov Report

Attention: 111 lines in your changes are missing coverage. Please review.

Comparison is base (ed8f67c) 72.73% compared to head (af3e5ee) 72.37%.
Report is 250 commits behind head on version-15-hotfix.

Additional details and impacted files

@@                  Coverage Diff                  @@
##           version-15-hotfix    #1258      +/-   ##
=====================================================
- Coverage              72.73%   72.37%   -0.36%     
=====================================================
  Files                    199      201       +2     
  Lines                  10769    10941     +172     
=====================================================
+ Hits                    7833     7919      +86     
- Misses                  2936     3022      +86     

Files	Coverage Δ
hrms/hooks.py	100.00% <ø> (ø)
...ms/hr/doctype/employee_advance/employee_advance.py	89.58% <100.00%> (+0.14%)	⬆️
hrms/hr/doctype/expense_claim/expense_claim.py	85.31% <100.00%> (+0.05%)	⬆️
...ms/hr/doctype/interview_detail/interview_detail.py	100.00% <ø> (ø)
...r/doctype/interview_feedback/interview_feedback.py	93.18% <100.00%> (-0.94%)	⬇️
.../hr/doctype/leave_application/leave_application.py	80.82% <100.00%> (+0.93%)	⬆️
...ms/hr/doctype/pwa_notification/pwa_notification.py	100.00% <100.00%> (ø)
...ms/hr/doctype/shift_assignment/shift_assignment.py	94.26% <100.00%> (+0.27%)	⬆️
hrms/overrides/employee_master.py	64.10% <100.00%> (+1.43%)	⬆️
...rms/payroll/doctype/payroll_entry/payroll_entry.py	84.60% <100.00%> (ø)
... and 16 more

... and 2 files with indirect coverage changes

[frappe-pr-bot]

🎉 This PR is included in version 15.9.0 🎉

The release is available on GitHub release

Your semantic-release bot 📦🚀