[backend] Simulations never ends if no inject / disabled injects / deleted injects (#1586)

[isselparra]

Proposed changes

• Handle inject with no injector contract

Related issues

• Closes Simulations never ends if no inject / disabled injects / deleted injects #1586

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• Where necessary I refactored code to improve the overall quality

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 59 lines in your changes missing coverage. Please review.

Project coverage is 33.52%. Comparing base (55d481f) to head (3d525b2).
Report is 10 commits behind head on master.

Files with missing lines	Patch %	Lines
...io/openbas/scheduler/jobs/InjectsExecutionJob.java	0.00%	59 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1711      +/-   ##
============================================
- Coverage     33.52%   33.52%   -0.01%     
- Complexity     1608     1658      +50     
============================================
  Files           557      561       +4     
  Lines         14477    15023     +546     
  Branches        871      947      +76     
============================================
+ Hits           4854     5037     +183     
- Misses         9398     9753     +355     
- Partials        225      233       +8     

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