feat: add mTLS support for remote communication

[Tochemey]

• Unit test the TLS based functions
• Abstract remoting into a nice struct called Remoting for client communication
• Add remoting option to all remoting-based methods both in PID and ActorSystem
• Refactor the cluster client to accept concrete Node instance rather than mere array list of addresses. This help to tailor client connection appropriately to the given node
• PeerState includes additional information called Certificate that help connect appropriately to the given peer. This hidden to the end-user :)
• Ensure that every http client connection closes appropriately to avoid resource leakage.
• Enhance ActorSystem option to allow setting a TLS configuration
• Enhance cluster client Node option to allow setting a TLS configuration
• Enhance remote scheduling to take into account mTLS

[codecov]

Codecov Report

Attention: Patch coverage is 87.32984% with 121 lines in your changes missing coverage. Please review.

Project coverage is 87.23%. Comparing base (7209b33) to head (a505db1).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
actors/actor_system.go	75.97%	27 Missing and 10 partials ⚠️
actors/remoting.go	86.04%	28 Missing and 8 partials ⚠️
actors/redistribution.go	69.38%	12 Missing and 3 partials ⚠️
client/client.go	86.17%	8 Missing and 5 partials ⚠️
actors/scheduler.go	84.48%	6 Missing and 3 partials ⚠️
client/node.go	83.63%	8 Missing and 1 partial ⚠️
actors/pid.go	98.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #504      +/-   ##
==========================================
- Coverage   87.40%   87.23%   -0.17%     
==========================================
  Files          45       47       +2     
  Lines        4294     4639     +345     
==========================================
+ Hits         3753     4047     +294     
- Misses        426      467      +41     
- Partials      115      125      +10     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[Tochemey]

This PR will not be merged in any time soon because as long as it is nice to have it one can also make use a good service mesh like istio or linkerd to secure communication between nodes.

[github-actions]

This pull is inactive since 14 days!
If there is no activity, it will be closed in two weeks.

You should take one of the following actions:

• Manually close this PR if it is no longer relevant
• Push new commits or comment if you have more information to share