[frontend/e2e] attempt to remove flake on backgroundTask test (#7378)

[aHenryJard]

Proposed changes

• Force reload page when the expect fails one time (kind of retry = 1)

Related issues

   [chromium] › backgroundTask/backgroundTask.spec.ts:24:5 › Verify background tasks execution ───
    
    Error: Timed out 60000ms waiting for expect(locator).toBeVisible()
    
    Locator: getByText('2 entitie(s)')
    Expected: visible
    Received: <element(s) not found>
    Call log:
    
    - expect.toBeVisible with timeout 60000ms
    - waiting for getByText('2 entitie(s)')

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case (coverage and e2e)
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.07%. Comparing base (9e724d2) to head (fc4d61b).
Report is 50 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7861      +/-   ##
==========================================
+ Coverage   67.38%   68.07%   +0.68%     
==========================================
  Files         570      570              
  Lines       70454    70609     +155     
  Branches     5949     6249     +300     
==========================================
+ Hits        47478    48067     +589     
+ Misses      22976    22542     -434     

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[aHenryJard]

Builld1 : all in success

[aHenryJard]

All green again. Trying a third time.