Refactor SecureChannel Encryption/Decryption & add SecurityPolicyInfo - Merge-able version

[mrsuciu]

Proposed changes

This is a merge-able version of changes described in from #3293 with additional code changes to make existing profiles work.

[codecov]

Codecov Report

❌ Patch coverage is 63.32288% with 351 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.09%. Comparing base (d25caff) to head (cfbebe7).
⚠️ Report is 10 commits behind head on master.

Files with missing lines	Patch %	Lines
...tack/Opc.Ua.Core/Security/Certificates/EccUtils.cs	0.45%	221 Missing ⚠️
...c.Ua.Core/Security/Certificates/EncryptedSecret.cs	72.09%	53 Missing and 19 partials ⚠️
...c.Ua.Core/Stack/Tcp/UaSCBinaryChannel.Symmetric.cs	73.02%	27 Missing and 14 partials ⚠️
...Opc.Ua.Core/Security/Constants/SecurityPolicies.cs	86.20%	4 Missing and 4 partials ⚠️
...c.Ua.Core/Security/Constants/SecurityPolicyInfo.cs	97.33%	5 Missing and 2 partials ⚠️
Stack/Opc.Ua.Core/Types/Utils/Utils.cs	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3351      +/-   ##
==========================================
+ Coverage   51.86%   60.09%   +8.22%     
==========================================
  Files         370      373       +3     
  Lines       78618    78719     +101     
  Branches    13650    13673      +23     
==========================================
+ Hits        40779    47304    +6525     
+ Misses      33705    27105    -6600     
- Partials     4134     4310     +176     

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