[Access] Implement inactivity tracker

[UlyanaAndrukhiv]

Closes: #6799

NOTE: this PR should be merged after #6798

Context

This PR implements an inactivity tracker for the WebSocket controller. It ensures that WebSocket connections are closed if there are no active subscriptions for a configured period of time.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 74.59459% with 141 lines in your changes missing coverage. Please review.

Project coverage is 41.13%. Comparing base (66e6db0) to head (fc086df).

Files with missing lines	Patch %	Lines
engine/access/rest/websockets/controller.go	81.64%	33 Missing and 5 partials ⚠️
.../rest/websockets/data_providers/events_provider.go	73.94%	22 Missing and 9 partials ⚠️
...ockets/data_providers/account_statuses_provider.go	76.78%	18 Missing and 8 partials ⚠️
utils/concurrentticker/concurrent_ticker.go	0.00%	16 Missing ⚠️
.../rest/websockets/data_providers/blocks_provider.go	52.63%	6 Missing and 3 partials ⚠️
cmd/access/node_builder/access_node_builder.go	0.00%	8 Missing ⚠️
cmd/observer/node_builder/observer_builder.go	0.00%	8 Missing ⚠️
...ckets/data_providers/mock/data_provider_factory.go	40.00%	3 Missing ⚠️
...e/access/rest/websockets/data_providers/factory.go	83.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6817      +/-   ##
==========================================
+ Coverage   41.01%   41.13%   +0.12%     
==========================================
  Files        2104     2108       +4     
  Lines      185030   185460     +430     
==========================================
+ Hits        75892    76297     +405     
+ Misses     102767   102752      -15     
- Partials     6371     6411      +40     

Flag	Coverage Δ
unittests	41.13% <74.59%> (+0.12%)	⬆️

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