core[minor],openai[patch]: Add usage metadata to `AIMessage`/`Chunk` #13262

Job	Run time
Check linting	5s
test-exports / exports-cf	2s
test-exports / exports-esbuild	2s
test-exports / exports-cjs	8s
test-exports / exports-esm	3s
test-exports / exports-vercel	2s
test-exports / exports-tsc	1s
test-exports / exports-vite	7s
	30s

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