[Access] Implement keepalive routine with ping-ponging to ws connection in ws controller

[UlyanaAndrukhiv]

Closes: #6639

Note: ##6750 should be merged first

Context

In this pull request implemented a keepalive routine to monitor WebSocket network connectivity using ping-pong messages.

Key Changes

• Integrated a keepalive logic with for WebSocket controller to detect and handle connectivity issues and ensured the keepalive operates independently, managing ping-pong messages and monitoring connection health.
• Added mechanisms to disable the WebSocket connection and gracefully shut down affected components when issues are detected.
• Added tests to validate connectivity issue detection and proper shutdown handling, including edge cases like missed pong responses and delayed ping intervals (in progress).

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 53.45622% with 101 lines in your changes missing coverage. Please review.

Project coverage is 41.92%. Comparing base (a164070) to head (afc8648).

Files with missing lines	Patch %	Lines
...ccess/rest/websockets/mock/websocket_connection.go	25.00%	54 Missing and 6 partials ⚠️
engine/access/rest/websockets/controller.go	66.96%	29 Missing and 8 partials ⚠️
engine/access/rest/websockets/connections.go	88.88%	2 Missing ⚠️
...access/rest/websockets/legacy/websocket_handler.go	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6757      +/-   ##
==========================================
+ Coverage   39.71%   41.92%   +2.20%     
==========================================
  Files        1332     1655     +323     
  Lines      123050   153507   +30457     
==========================================
+ Hits        48875    64359   +15484     
- Misses      69986    83860   +13874     
- Partials     4189     5288    +1099     

Flag	Coverage Δ
unittests	41.92% <53.45%> (+2.20%)	⬆️

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[Guitarheroua]

After the first round of review - looks cool!

[illia-malachyn]

I guess what you need is WriteControl() method which accepts deadline as well