Conform server tracing interceptor to OTel's conventions #64

Job	Run time
Soundness / Swift license headers check	5s
Cxx interop / Construct Cxx interop matrix	4s
Soundness / Check generated code	2m 1s
Unit tests / Construct unit test matrix	4s
Soundness / API breakage check	2m 0s
Soundness / Documentation check	1m 30s
Soundness / Broken symlinks check	2s
Soundness / Format check	36s
Soundness / License headers check	3s
Soundness / Python lint check	3s
Soundness / Shell check	35s
Soundness / Unacceptable language check	2s
Soundness / YAML lint check	3s
Unit tests / Unit tests / Linux (6.0)	1m 31s
Unit tests / Unit tests / Linux (nightly-6.1)	1m 38s
Unit tests / Unit tests / Linux (nightly-main)	1m 38s
Cxx interop / Cxx interop / Linux (6.0)	1m 31s
Cxx interop / Cxx interop / Linux (nightly-6.1)	1m 45s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 50s
	17m 1s

Provide feedback