[backend/frontend] Adapt code base to manage the installation of multiples agents

[savacano28]

Proposed changes

• Hostname to lowercase to make uniform and unique
• SQL migration : migrate agents to same endpoint (hostname + platform + arch)
• New method to register an endpoint/agent : Endpoint (hostname + platform + arch) exists ? Then Agent (assetId + executor + executedByUser + deploymentMode + privilege) exists ?
• Injects are now launched by agent and no more by asset

Related issues

• Closes I can choose the level of privilege of my agent #1860
• Closes Tanium seems to not deduplicate assets when it collects #2151
• Closes Need to standardize our way of gathering our endpoints depending on the executors #2233

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

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 12.95337% with 168 lines in your changes missing coverage. Please review.

Project coverage is 37.43%. Comparing base (1eaeb50) to head (be25ebb).
Report is 6 commits behind head on release/current.

Files with missing lines	Patch %	Lines
...xecutors/tanium/service/TaniumExecutorService.java	2.89%	67 Missing ⚠️
...rowdstrike/service/CrowdStrikeExecutorService.java	4.25%	45 Missing ⚠️
...io/openbas/execution/ExecutionExecutorService.java	0.00%	23 Missing ⚠️
.../main/java/io/openbas/service/EndpointService.java	55.17%	10 Missing and 3 partials ⚠️
...ain/java/io/openbas/rest/injector/InjectorApi.java	0.00%	6 Missing ⚠️
...src/main/java/io/openbas/service/AgentService.java	14.28%	6 Missing ⚠️
...caldera/service/CalderaExecutorContextService.java	0.00%	2 Missing ⚠️
...ike/service/CrowdStrikeExecutorContextService.java	0.00%	2 Missing ⚠️
...openbas/service/OpenBASExecutorContextService.java	0.00%	2 Missing ⚠️
...s/tanium/service/TaniumExecutorContextService.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@                  Coverage Diff                  @@
##             release/current    #2208      +/-   ##
=====================================================
+ Coverage              34.55%   37.43%   +2.88%     
- Complexity              1590     1780     +190     
=====================================================
  Files                    586      591       +5     
  Lines                  17991    19044    +1053     
  Branches                1169     1329     +160     
=====================================================
+ Hits                    6217     7130     +913     
- Misses                 11471    11575     +104     
- Partials                 303      339      +36     

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