[extension/encoding/azureencoding] migrate semconv from v1.39.0

[singhvibhanshu]

Resolves #47543

Assisted-by: GPT-5.3-Codex

[paulojmdias]

This kind of changes when producing changes on attributes it should have a changelog file.

Also, please see the RFC about the semconv feature gates since it should be following as is it producing a breaking change https://github.com/open-telemetry/opentelemetry-collector/blob/main/docs/rfcs/semconv-feature-gates.md

[singhvibhanshu]

/rerun

[singhvibhanshu]

This PR got merge conflicts.
I'll fix them soon.

[singhvibhanshu]

Hi there!
I've resolved the merge conflicts.
@axw , @constanca-m, could you please take a look at it when you get a chance?
Thank you!

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