mistralai[minor]: Add llms entrypoint, update chat model integration #13308

Job	Run time
Check linting	5m 46s
test-exports / exports-esbuild	4m 55s
test-exports / exports-esm	5m 3s
test-exports / exports-cf	5m 33s
test-exports / exports-cjs	5m 3s
test-exports / exports-vercel	5m 43s
test-exports / exports-tsc	4m 43s
test-exports / exports-vite	4m 48s
	41m 34s

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