[TRTLLM-3602][feat] support nvfp4 model and fp8 kv cache for MLA chunked prefill (Blackwell)

[jmydurant]

Description

support nvfp4 model and fp8 kv cache for MLA chunked prefill. It contains some commits based on #4651

Test Coverage

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[jmydurant]

/bot run --disable-fail-fast

[tensorrt-cicd]

PR_Github #9861 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #9861 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #7274 completed with status: 'SUCCESS'
Pipeline passed with automatic retried tests. Check the rerun report for details.

[PerkzZheng]

@jmydurant can you help rebase this branch to the latest main ? it seems to contain many commits from #4651

[jmydurant]

/bot run --disable-fail-fast

[tensorrt-cicd]

PR_Github #9962 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #9962 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #7350 completed with status: 'SUCCESS'

[jmydurant]

/bot run --disable-fail-fast

[tensorrt-cicd]

PR_Github #10022 [ run ] triggered by Bot

[tensorrt-cicd]

PR_Github #10022 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #7394 completed with status: 'SUCCESS'
Pipeline passed with automatic retried tests. Check the rerun report for details.

[jmydurant]

/bot run --disable-fail-fast

[tensorrt-cicd]

PR_Github #10037 [ run ] triggered by Bot

[kaiyux]

/bot skip --comment "the last commit is just modifying comment, no need to rerun pipeline"

[tensorrt-cicd]

PR_Github #10042 [ skip ] triggered by Bot

[tensorrt-cicd]

PR_Github #10037 [ run ] completed with state ABORTED

[tensorrt-cicd]

PR_Github #10042 [ skip ] completed with state SUCCESS
Skipping testing for commit 3604b9c