Enable process tags tests for service name in dotnet

[amarziali]

Motivation

Enable service name related process tags in dotnet.

Notes:

1. Process tags are not yet enabled by default in dotnet so I forced the configuration (to be removed when all the languages will switch them on)
2. I took the occasion to fix the check since the tests did not apply the normalisation expected (I simplified with lowercasing that's good enough)

Changes

Workflow

1. ⚠️ Create your PR as draft ⚠️
2. Work on you PR until the CI passes
3. Mark it as ready for review
   • Test logic is modified? -> Get a review from RFC owner.
   • Framework is modified, or non obvious usage of it -> get a review from R&P team

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Reviewer checklist

• Anything but tests/ or manifests/ is modified ? I have the approval from R&P team
• A docker base image is modified?
  • the relevant build-XXX-image label is present
• A scenario is added, removed or renamed?
  • Get a review from R&P team

[github-actions]

CODEOWNERS have been resolved as:

manifests/dotnet.yml                                                    @DataDog/apm-dotnet @DataDog/asm-dotnet
tests/parametric/test_tracer.py                                         @DataDog/system-tests-core @DataDog/apm-sdk-capabilities

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