[backend] fix migration for local strategy (#14737)

[marieflorescontact]

Proposed changes

• for an existing platform in 6.9.x, with local auth disabled => conversion set it to enabled, probably because it's config { disabled: true } and code looks for enabled here

Related issues

• closes: Disabled local authentication strategy is set to enable following conversion to V7 #14737

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

[marieflorescontact]

@copilot add test coverage for this PR

[Copilot]

@marieflorescontact I've opened a new pull request, #14791, to work on those changes. Once the pull request is ready, I'll request review from you.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 32.75%. Comparing base (820a5b0) to head (037c64b).
⚠️ Report is 34 commits behind head on master.

Files with missing lines	Patch %	Lines
...cationProvider/authenticationProvider-migration.ts	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #14790      +/-   ##
==========================================
+ Coverage   32.36%   32.75%   +0.39%     
==========================================
  Files        3107     3111       +4     
  Lines      211587   213397    +1810     
  Branches    38362    39048     +686     
==========================================
+ Hits        68472    69896    +1424     
- Misses     143115   143501     +386     

Flag	Coverage Δ
opencti-client-python	44.13% <ø> (-1.35%)	⬇️
opencti-front	2.82% <ø> (-0.01%)	⬇️
opencti-graphql	68.32% <66.66%> (+0.65%)	⬆️

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[aHenryJard]

Looks good to me, tested locally:

• on a new platform V7, local is enabled by default as expected
• on an existing platform with auth0 + local disabled, after moving to this branch the local is correctly disabled (only auth0 button is displayed)