Fix CodeQL issues

[mregen]

• fix uncontrolled format string and clear text storage of sensitive information issues flagged by CodeQL

Uncontrolled format string (Stack/Opc.Ua.Core/Types/Utils/Utils.cs:298)
Clear text storage of sensitive information (Applications/ReferenceServer/SerilogTraceLogger.cs:120)
Clear text storage of sensitive information (Applications/ReferenceServer/SerilogTraceLogger.cs:126)
Clear text storage of sensitive information (Applications/ReferenceServer/SerilogTraceLogger.cs:127)
Clear text storage of sensitive information (Applications/ReferenceServer/SerilogTraceLogger.cs:129)
Clear text storage of sensitive information (Applications/ReferenceServer/SerilogTraceLogger.cs:130)

[codecov]

Codecov Report

Merging #1591 (50e82a9) into master (e61594e) will decrease coverage by 0.04%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##           master    #1591      +/-   ##
==========================================
- Coverage   52.90%   52.85%   -0.05%     
==========================================
  Files         312      312              
  Lines       57333    57333              
==========================================
- Hits        30330    30302      -28     
- Misses      27003    27031      +28     

Impacted Files	Coverage Δ
...ndings.Https/Stack/Https/HttpsTransportListener.cs	68.15% <0.00%> (ø)
...raries/Opc.Ua.Configuration/ApplicationInstance.cs	60.00% <33.33%> (ø)
...ack/Opc.Ua.Core/Stack/Transport/AsyncResultBase.cs	61.61% <0.00%> (-5.06%)	⬇️
...indings.Https/Stack/Https/HttpsTransportChannel.cs	66.21% <0.00%> (-3.38%)	⬇️
Stack/Opc.Ua.Core/Stack/Tcp/UaSCBinaryChannel.cs	67.65% <0.00%> (-1.71%)	⬇️
Stack/Opc.Ua.Core/Types/BuiltIn/DiagnosticInfo.cs	60.00% <0.00%> (-1.38%)	⬇️
...ack/Opc.Ua.Core/Stack/Tcp/ChannelAsyncOperation.cs	67.70% <0.00%> (-1.05%)	⬇️
Libraries/Opc.Ua.Server/Session/SessionManager.cs	71.37% <0.00%> (-1.04%)	⬇️
Stack/Opc.Ua.Core/Types/Utils/ServiceResult.cs	69.15% <0.00%> (-0.94%)	⬇️
...tack/Opc.Ua.Core/Stack/Tcp/TcpTransportListener.cs	72.15% <0.00%> (-0.40%)	⬇️
... and 5 more

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