[tool] update drone & circle for prerelease platform (#1909)

[guillaumejparis]

Proposed changes

• Add build & deploy for prerelease when merging on release/*
• Add a way to fetch latests/prelease agents/implants when on testing/prerelease

Related issues

• Closes Handle prerelease platform on our CI #1909

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

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[codecov]

Codecov Report

Attention: Patch coverage is 27.02703% with 27 lines in your changes missing coverage. Please review.

Project coverage is 33.61%. Comparing base (d0b1c67) to head (185be17).
Report is 21 commits behind head on master.

Files with missing lines	Patch %	Lines
...ain/java/io/openbas/rest/executor/ExecutorApi.java	0.00%	19 Missing ⚠️
...ain/java/io/openbas/rest/injector/InjectorApi.java	0.00%	8 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1978      +/-   ##
============================================
- Coverage     33.62%   33.61%   -0.01%     
- Complexity     1671     1767      +96     
============================================
  Files           572      574       +2     
  Lines         16697    17582     +885     
  Branches        970     1113     +143     
============================================
+ Hits           5614     5911     +297     
- Misses        10829    11409     +580     
- Partials        254      262       +8     

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