Adapt to upstream FlagGems repo split and record pre_hook configs for libtuner

Upstream moved from single /workspace/FlagGems-dev to /workspace/dev/FlagGems
(flag_gems) plus /workspace/dev/FlagGems-vllm (flaggems_vllm). Patch LibTuner
per actually-imported package at collection finish instead of hardcoding
flag_gems, and update the default FLAGGEMS_DIR.

Also stop dropping pre_hook configs for libtuner kernels: hopper mm's TMA
configs carry a pre_hook even with USE_FLAGTUNE=0, so record silently skipped
them and replay fell back. Upstream LibTuner.run now re-attaches the hook by
kwargs match on cache read (same path as its own ConfigCache round-trip), so
pre_hook-less injection is safe there; plain triton Autotuner keeps the drop.

run_pytest.sh

@@ -11,7 +11,9 @@ set -euo pipefail
 OP="${OP:-fused_marlin_moe_mxfp4}"
 OP_FILE="${OP_FILE:-fused_marlin_moe}"
 
-FLAGGEMS_DIR="${FLAGGEMS_DIR:-/workspace/FlagGems-dev}"
+# 上游已拆分为两个仓库：主仓 /workspace/dev/FlagGems（包名 flag_gems）与
+# /workspace/dev/FlagGems-vllm（包名 flaggems_vllm）。测 vllm 仓库算子时覆盖本变量即可。
+FLAGGEMS_DIR="${FLAGGEMS_DIR:-/workspace/dev/FlagGems}"
 
 # shape 来源：非空则用该 yaml，否则用 INLINE_YAML。顶层 key 必须是 op 名。
 SHAPE_FILE="${SHAPE_FILE:-}"