Changes since langchain-openai==0.3.18

openai: release 0.3.19 (#31466)
openai[minor]: add image generation to responses api (#31424)
infra: remove use of --vcr-record=none (#31452)
standard-tests: migrate to pytest-recording (#31425)
infra: drop azure from streaming benchmarks (#31421)
openai: cache httpx client (#31260)
standard-tests: add benchmarks (#31302)
openai[patch]: add test case for code interpreter (#31383)