fix(diffusion_planner): add `turn_indicator_batch_idx` #15025

Job	Run time
require-label / require-label	2s
check-if-cuda-job-is-needed	23s
build-and-test-differential / build-and-test-differential	6m 2s
build-and-test-packages-above-differential / build-and-test-packages-above-differential	2m 52s
build-and-test-differential-cuda / build-and-test-differential	4m 54s
clang-tidy-differential-cuda / clang-tidy-differential	1m 24s
clang-tidy-differential / clang-tidy-differential	0s
	15m 37s

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