chore: add net8.0 preview support

[stijnmoreels]

Add .NET 8 (preview) support to the project.

Relates to arcus-azure/arcus#311

[netlify]

✅ Deploy Preview for arcus-observability canceled.

Name	Link
🔨 Latest commit	4348db1
🔍 Latest deploy log	https://app.netlify.com/sites/arcus-observability/deploys/6503d78594da830007b4bb0e

[stijnmoreels]

Waiting for arcus-azure/azure-devops-templates#57 to include preview .NET SDK's in the build.

[stijnmoreels]

Azure Functions v4 is not yet available for .NET 8?
https://learn.microsoft.com/en-us/azure/azure-functions/functions-versions?tabs=v4&pivots=programming-language-csharp#languages

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -1.04% ⚠️

Comparison is base (2ed0469) 86.34% compared to head (4348db1) 85.31%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #537      +/-   ##
==========================================
- Coverage   86.34%   85.31%   -1.04%     
==========================================
  Files          76       76              
  Lines        3201     3201              
  Branches      220      220              
==========================================
- Hits         2764     2731      -33     
- Misses        360      394      +34     
+ Partials       77       76       -1     

Files Changed	Coverage Δ
...ons/Extensions/ILoggerHttpRequestDataExtensions.cs	0.00% <ø> (-100.00%)	⬇️

... and 1 file with indirect coverage changes

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[fgheysels]

So, you succeeded in getting the dockerstuff working \o/

[fgheysels]

There are some hints / advise that the code-analysis is reporting regarding the usage of obsolete methods. MIght be good to tackle that as well ?

[stijnmoreels]

There are some hints / advise that the code-analysis is reporting regarding the usage of obsolete methods. MIght be good to tackle that as well ?

Think we currently report the code coverage and any security risks. Obsolete functionality should indeed be part of that security risk assessment. But: we have enabled 'warnings as errors' so those should also break the build.