Add GenAI semconv attributes to native OTel spans #2651

Job	Run time
checks / pre-commit	33s
checks / readme-snippets	11s
checks / test (3.12, locked, ubuntu-latest)	54s
checks / test (3.11, lowest-direct, windows-latest)	1m 40s
checks / test (3.11, lowest-direct, ubuntu-latest)	48s
checks / test (3.14, lowest-direct, ubuntu-latest)	46s
checks / test (3.14, lowest-direct, windows-latest)	1m 10s
checks / test (3.13, lowest-direct, windows-latest)	57s
checks / test (3.13, lowest-direct, ubuntu-latest)	54s
checks / test (3.13, locked, windows-latest)	1m 22s
checks / test (3.13, locked, ubuntu-latest)	39s
checks / test (3.14, locked, ubuntu-latest)	1m 55s
checks / test (3.14, locked, windows-latest)	2m 14s
checks / test (3.12, locked, windows-latest)	1m 24s
checks / test (3.10, lowest-direct, ubuntu-latest)	50s
checks / test (3.10, locked, ubuntu-latest)	55s
checks / test (3.11, locked, ubuntu-latest)	52s
checks / test (3.10, lowest-direct, windows-latest)	1m 20s
checks / test (3.12, lowest-direct, windows-latest)	1m 25s
checks / test (3.11, locked, windows-latest)	1m 35s
checks / test (3.10, locked, windows-latest)	1m 16s
checks / test (3.12, lowest-direct, ubuntu-latest)	58s
all-green	5s
	24m 43s

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