Conform server tracing interceptor to OTel's conventions #61

Job	Run time
Soundness / Check generated code	2m 8s
Cxx interop / Construct Cxx interop matrix	2s
Soundness / Swift license headers check	2s
Unit tests / Construct unit test matrix	3s
Soundness / Broken symlinks check	2s
Soundness / API breakage check	1m 22s
Soundness / Documentation check	1m 23s
Soundness / Format check	35s
Soundness / License headers check	3s
Soundness / Python lint check	4s
Soundness / Shell check	29s
Soundness / Unacceptable language check	19s
Soundness / YAML lint check	3s
Cxx interop / Cxx interop / Linux (6.0)	1m 34s
Cxx interop / Cxx interop / Linux (nightly-6.1)	1m 34s
Cxx interop / Cxx interop / Linux (nightly-main)	1m 34s
Unit tests / Unit tests / Linux (6.0)	1m 34s
Unit tests / Unit tests / Linux (nightly-6.1)	1m 34s
Unit tests / Unit tests / Linux (nightly-main)	1m 35s
	16m 0s

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