[backend] Change kill_chain_phase.order attribute upsert value (#8182)

[lndrtrbn]

Proposed changes

• Set upsert false to attribute order of kill chain phase

Related issues

• closes Order of kill chain phases are lost after dataset is updated #8182

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.06%. Comparing base (a44ccda) to head (2b6857d).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8181      +/-   ##
==========================================
+ Coverage   66.05%   66.06%   +0.01%     
==========================================
  Files         597      597              
  Lines       59732    59732              
  Branches     6079     6081       +2     
==========================================
+ Hits        39455    39462       +7     
+ Misses      20277    20270       -7     

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