[skip ci] Update nightly support matrices

Signed-off-by: Buildkite Bot <buildkite-bot@users.noreply.github.com>

Author: buildkite-bot

support_matrices/nightly/feature_support_matrix.csv

@@ -7,6 +7,6 @@ Feature,CorrectnessTest,PerformanceTest
 "JAX-Path Qxix Quantization",✅,✅
 "Multimodal Inputs",✅,✅
 "async scheduler",✅,✅
-"Speculative Decoding: Ngram",✅,✅
+"Speculative Decoding: Ngram",✅,❌
 "Collective Communication Matmul",✅,N/A
 "Ragged Paged Attention V3",✅,✅

support_matrices/nightly/model_support_matrix.csv

@@ -1,8 +1,8 @@
 Model,UnitTest,IntegrationTest,Benchmark
-"meta-llama/Llama-3.3-70B-Instruct",✅,✅,✅
+"meta-llama/Llama-3.3-70B-Instruct",❌,N/A,N/A
 "Qwen/Qwen3-4B",✅,✅,✅
 "Qwen/Qwen2.5-VL-7B-Instruct",✅,❌,N/A
 "google/gemma-3-27b-it",✅,✅,✅
 "Qwen/Qwen3-32B",✅,✅,✅
-"meta-llama/Llama-3.1-8B-Instruct",✅,✅,✅
+"meta-llama/Llama-3.1-8B-Instruct",❌,N/A,N/A
 "Qwen/Qwen3-30B-A3B",✅,✅,❌