APPS-1431 Synchronize access to the service configuration

[korotkov-aerospike]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 58.33333% with 20 lines in your changes missing coverage. Please review.

Project coverage is 44.01%. Comparing base (8f2781f) to head (80da7c6).
Report is 1 commits behind head on v3.

Files with missing lines	Patch %	Lines
pkg/dto/backup_details.go	0.00%	8 Missing ⚠️
pkg/service/config_applier.go	0.00%	7 Missing ⚠️
pkg/service/aerospike/namespace_validator.go	0.00%	3 Missing ⚠️
pkg/dto/base_dto.go	0.00%	1 Missing ⚠️
pkg/dto/restore_request.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##               v3     #295      +/-   ##
==========================================
+ Coverage   43.92%   44.01%   +0.09%     
==========================================
  Files          52       52              
  Lines        2857     2851       -6     
==========================================
  Hits         1255     1255              
+ Misses       1476     1470       -6     
  Partials      126      126              

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[korotkov-aerospike]

1. moved lock from config to service level.
2. reduced number of pointers to config. Actually, now after initial startup, it is only stored in http service. So, every request to config goes through http service.
   Periodic backups dont access config.