Remove mutex use in interceptor

[iulianpascalau]

Description of the reasoning behind the pull request (what feature was missing / how the problem was manifesting itself / what was the motive behind the refactoring)

• there was a bug in the SingleDataInterceptor that caused a mutex to be held for too much time. The mutex involved is mutDebugHandler that protects the debugHandler resource and is correctly used in the baseDataInterceptor common struct. The extra usage in SingleDataInterceptor remained from the last refactor that was carried ~2 years ago.

Proposed Changes

• remove the extra usage of the mutex in the SingleDataInterceptor

Testing procedure

• standard testing procedure

[codecov-commenter]

Codecov Report

Merging #4407 (48de2a3) into rc/2022-july (7d3761c) will increase coverage by 0.04%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           rc/2022-july    #4407      +/-   ##
================================================
+ Coverage         73.87%   73.91%   +0.04%     
================================================
  Files               677      677              
  Lines             86864    86862       -2     
================================================
+ Hits              64173    64208      +35     
+ Misses            17895    17860      -35     
+ Partials           4796     4794       -2     

Impacted Files	Coverage Δ
process/interceptors/singleDataInterceptor.go	97.61% <ø> (-0.06%)	⬇️
...t/processor/peerAuthenticationRequestsProcessor.go	96.80% <0.00%> (+2.39%)	⬆️
storage/txcache/txListBySenderMap.go	100.00% <0.00%> (+2.50%)	⬆️
common/pidQueue.go	96.66% <0.00%> (+3.33%)	⬆️
p2p/libp2p/netMessenger.go	80.02% <0.00%> (+3.91%)	⬆️

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[gabi-vuls]

System test passed.