fix(service-discovery): report go instead of golang

[dmehala]

What does this PR do?

This change the language reported to be go instead of golang to be coherent with the RFC and the telemetry module.

Reviewer's Checklist

• Changed code has unit tests for its functionality at or near 100% coverage.
• System-Tests covering this feature have been added and enabled with the va.b.c-dev version tag.
• There is a benchmark for any new code, or changes to existing code.
• If this interacts with the agent in a new way, a system test has been added.
• Add an appropriate team label so this PR gets put in the right place for the release notes.
• Non-trivial go.mod changes, e.g. adding new modules, are reviewed by @DataDog/dd-trace-go-guild.
• For internal contributors, a matching PR should be created to the v2-dev branch and reviewed by @DataDog/apm-go.

Unsure? Have a question? Request a review!

[datadog-datadog-prod-us1]

Datadog Report

Branch report: dmehala/fix/service-discovery-report-lang
Commit report: f38b1a9
Test service: dd-trace-go

✅ 0 Failed, 5487 Passed, 72 Skipped, 10m 13.02s Total Time

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-03-27 11:24:21

Comparing candidate commit d1d3943 in PR branch dmehala/fix/service-discovery-report-lang with baseline commit 1be9aea in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 61 metrics, 1 unstable metrics.

[dmehala]

@darccio or @kakkoyun I am not authorized to merge, can any of you do it please?

[darccio]

Done @dmehala