[backend][frontend] Fixed an issue on injects where total number of injects was not correctly updated and bulk delete didn't refresh results

[impolitepanda]

Proposed changes

• [backend] feat: changed return of bulk delete to return list of deleted injects
• [frontend] fix: fixed total number of elements not being updated when creating or deleting an inject
• [frontend] fix: fixed bulk delete not being reflected in datatables without refresh

Related issues

• Fixes some bugs from issue Ability to select all injects with a 'select all'  #1961

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality
• For bug fix -> I implemented a test that covers the bug

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 32.70%. Comparing base (51f58ec) to head (4f7c1ce).

Files with missing lines	Patch %	Lines
.../io/openbas/rest/inject/service/InjectService.java	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #2207   +/-   ##
=========================================
  Coverage     32.69%   32.70%           
- Complexity     1513     1515    +2     
=========================================
  Files           582      582           
  Lines         18033    18037    +4     
  Branches       1156     1156           
=========================================
+ Hits           5896     5899    +3     
  Misses        11874    11874           
- Partials        263      264    +1     

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