[dotnet] Enable and addapt waf telemetry tests for dotnet

[daniel-romano-DD]

Motivation

Needs V3.37.0 (next release)

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

🚀 Once your PR is reviewed and the CI green, you can merge it!

🛟 #apm-shared-testing 🛟

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/appsec/waf/test_telemetry.py                                      @DataDog/asm-libraries @DataDog/system-tests-core

[datadog-official]

⚠️ Tests

✨ Fix all issues with Cursor

⚠️ Warnings

🧪 2 Tests failed

tests.appsec.waf.test_truncation.Test_Truncation.test_truncation[poc] from system_tests_suite (Datadog) (Fix with Cursor)

KeyError: '_dd.appsec.truncated.string_length'

self = <tests.appsec.waf.test_truncation.Test_Truncation object at 0x7f5370b2d1f0>

    def test_truncation(self):
        span = interfaces.library.get_root_span(self.req)
        metrics = span.get("metrics")
        assert metrics, "Expected metrics"
    
>       assert int(metrics["_dd.appsec.truncated.string_length"]) == 5000
...

tests.appsec.waf.test_truncation.Test_Truncation.test_truncation[uds] from system_tests_suite (Datadog) (Fix with Cursor)

KeyError: '_dd.appsec.truncated.string_length'

self = <tests.appsec.waf.test_truncation.Test_Truncation object at 0x7fbb8deebcb0>

    def test_truncation(self):
        span = interfaces.library.get_root_span(self.req)
        metrics = span.get("metrics")
        assert metrics, "Expected metrics"
    
>       assert int(metrics["_dd.appsec.truncated.string_length"]) == 5000
...

ℹ️ Info

❄️ No new flaky tests detected

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