Content block tokens supported in callbacks

Changes since langchain-anthropic==1.4.4

release(anthropic): 1.4.5 (#38036) fix(core): support content block tokens in callbacks (#34739) chore(model-profiles): refresh model profile data (#38012) hotfix(openai): min core dep (#37990) test(langchain,partners): disable pytest-benchmark under xdist to silence PytestBenchmarkWarning (#37901) chore(model-profiles): refresh model profile data (#37895) chore(model-profiles): refresh model profile data (#37771)