Support for .NET 8

[Kielek]

Why

Towards: #2946

What

Support for .NET 8

Tests

Checklist

• CHANGELOG.md is updated.
• Documentation is updated.
• New features are covered by tests.
• Test changes on Windows with Linux - Docker
• Test changes on MacOs with Linux - Docker

Notes

1. Thanks to @andrewlock for the DuckTyping fix after breaking changes in
   https://github.com/dotnet/runtime/pull/78544/files#diff-06068c51107f17306c32fecbb6c79ec0cd5f15c9c0efe8d5a42b093be05e72e7
2. Linux distribution is build in 2 steps. Native code on Centos 7, then on Ubuntu full build with replacing native code by Ubuntu. All tests previously using Centos artifacts references Ubuntu artifacts.
   Native code compatibility by .NET versions:
   • .NET6: https://github.com/dotnet/core/blob/main/release-notes/6.0/supported-os.md#libc-compatibility
     x64:
     - glibc 2.17 (from CentOS 7)
     - Alpine (x64 and Arm64): musl 1.2.2 (from Alpine 3.13)
   • .NET7: https://github.com/dotnet/core/blob/main/release-notes/7.0/supported-os.md#libc-compatibility
     - x64: glibc 2.17 (from CentOS 7)
     - Alpine (x64 and Arm64): musl 1.2.2 (from Alpine 3.15)
   • .NET8: https://github.com/dotnet/core/blob/main/release-notes/8.0/supported-os.md#libc-compatibility
     • glibc 2.23 (from Ubuntu 16.04)
     • Alpine: musl 1.2.2 (from Alpine 3.13)

TODOs

Replace all references to .NET8RC by stable version when possible.
Consider to update OTel to 1.7.0, but it will brings upgraded references. It can be done probably in separate PR. - separate PR, probably after release based on 1.6.0.
Handle dependabot PR related to the .NET8 package updates - can be done when this is merged.

[rajkumar-rangaraj]

Reviewed the PR, it looks good to me. Once .NET 8.0 is GA, we could update the reference and merge the PR.

[rajkumar-rangaraj]

.NET 8.0 has been released today - https://devblogs.microsoft.com/dotnet/november-2023-updates/

[Kielek]

@rajkumar-rangaraj, internally we have discussed Dynamic PGO impact on our bytecode instrumentation: https://devblogs.microsoft.com/dotnet/performance-improvements-in-net-8/#tiering-and-dynamic-pgo

I do not think that this change breaks anything, but is there any chance that you can double check and confirm it?

[Kielek]

@rajkumar-rangaraj, ready for final review. Workarounds for .NET8-rc removed.

EDIT: Before merge we need to adjust required builds as it was changed in this PR.