feat(compress): call reset storage policy directly from Rust

The CCtx reset tail already delegated storage reservation and ordering policy
to Rust, but crossed back into C through a redundant callback trampoline.
Project the storage state directly through the existing pointer-sized ABI slot
and invoke the Rust storage operation without the extra C hop. Keep private
workspace/layout callbacks and match-state reset in C, preserve hash -> match
-> storage ordering, and retain allocation-error propagation in Rust tests.

Test Plan:
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 cargo check --manifest-path rust/Cargo.toml --tests
- ulimit -v 41943040; CARGO_BUILD_JOBS=1 cargo clippy --manifest-path rust/cli/Cargo.toml --all-targets -- -D warnings
- ulimit -v 41943040; make -j1
- ulimit -v 41943040; make -j1 -C tests test

lib/compress/zstd_compress.c

@@ -2304,7 +2304,7 @@ typedef struct {
     ZSTD_rust_resetCCtxStorageCallback_f resetHash;
     void* compressedBlockState;
     ZSTD_rust_resetCCtxTailCallback_f resetMatchState;
-    ZSTD_rust_resetCCtxTailCallback_f resetStorage;
+    const ZSTD_rust_resetCCtxStorageState* storageState;
     ZSTD_compressionParameters* matchStateCParams;
     int* matchStatePrefetchCDictTables;
     unsigned long long* pledgedSrcSizePlusOne;
@@ -2327,7 +2327,7 @@ typedef char ZSTD_rust_reset_cctx_tail_state_layout[
                 == 2 * sizeof(void*)
          && offsetof(ZSTD_rust_resetCCtxTailState, resetMatchState)
                 == 3 * sizeof(void*)
-         && offsetof(ZSTD_rust_resetCCtxTailState, resetStorage)
+         && offsetof(ZSTD_rust_resetCCtxTailState, storageState)
                 == 4 * sizeof(void*)
          && offsetof(ZSTD_rust_resetCCtxTailState, matchStateCParams)
                 == 5 * sizeof(void*)
@@ -5389,13 +5389,6 @@ static size_t ZSTD_rust_resetCCtxTail_resetMatchState(void* opaque)
             ZSTD_resetTarget_CCtx);
 }
 
-static size_t ZSTD_rust_resetCCtxTail_resetStorage(void* opaque)
-{
-    ZSTD_rust_resetCCtxTailContext* const context =
-            (ZSTD_rust_resetCCtxTailContext*)opaque;
-    return ZSTD_rust_resetCCtxStorage(context->storageState);
-}
-
 /*! ZSTD_resetCCtx_internal() :
  * @param loadedDictSize The size of the dictionary to be loaded
  * into the context, if any. If no dictionary is used, or the
@@ -5534,7 +5527,7 @@ static size_t ZSTD_resetCCtx_internal(ZSTD_CCtx* zc,
         tailState.resetHash = ZSTD_rust_resetCCtxTail_resetHash;
         tailState.compressedBlockState = NULL;
         tailState.resetMatchState = ZSTD_rust_resetCCtxTail_resetMatchState;
-        tailState.resetStorage = ZSTD_rust_resetCCtxTail_resetStorage;
+        tailState.storageState = &storageState;
         tailState.matchStateCParams = &zc->blockState.matchState.cParams;
         tailState.matchStatePrefetchCDictTables =
                 &zc->blockState.matchState.prefetchCDictTables;