Refactor: tracker core service only needs the core config

[josecelano]

Relates to: #401

After extracting the Core config type, we don't need to pass the whole configuration to the tracker core service. We can pass only its config.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.83%. Comparing base (014ca38) to head (ae77ebc).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #857      +/-   ##
===========================================
+ Coverage    78.75%   78.83%   +0.07%     
===========================================
  Files          169      169              
  Lines         9293     9341      +48     
===========================================
+ Hits          7319     7364      +45     
- Misses        1974     1977       +3     

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[josecelano]

ACK ae77ebc