feat: register e2ei root cert before the first enrollment

[PatrykBuniX]

Description

Before the first enrollment is done, we need to register the root cert.

Checklist

• PR has been self reviewed by the author;
• Hard-to-understand areas of the code have been commented;
• If it is a core feature, unit tests have been added;

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (eb572d2) 45.42% compared to head (b1c88ae) 45.42%.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev   #16557   +/-   ##
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  Coverage   45.42%   45.42%           
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  Files         740      740           
  Lines       24239    24240    +1     
  Branches     5506     5506           
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+ Hits        11010    11011    +1     
  Misses      11822    11822           
  Partials     1407     1407