[Bugfix][TE] Fix Ascend wildcard location fallback and 64KB memory alignment

[gygdh-001]

Description

Fix two defects that prevent host-memory registration on the Ascend transfer engine (see #4046):

1. Wildcard location probe falls back to host memory (ascend_direct_transport.cpp)

   ResolveAscendMemType() previously used CHECK_ACL, treating an
   aclrtPointerGetAttributes() failure as a hard error (returning -1). As a result,
   registering host memory (hugepage / shm / malloc) with the wildcard location "*"
   failed on Ascend. CUDA already falls back when the wildcard probe cannot identify the
   memory; this change aligns Ascend by treating the probe failure as host memory
   (adxl::MEM_HOST). This matches the existing fix for the heterogeneous RDMA transport
   (fix: fix heterogeneous rdma transport error #1657).

2. 64KB-aligned default allocator (transfer_engine_py.cpp)

   initMemoryAllocator()'s fallback path used plain malloc, whose address is not
   64KB page-aligned. Ascend SVM (_devmm_mem_remote_map) requires a 64KB-aligned
   src_va, so aclrtHostRegister failed with EINVAL. The fallback now uses
   posix_memalign(64 * 1024, ...).

Module

• Transfer Engine (mooncake-transfer-engine)
• Mooncake Store (mooncake-store)
• Reshard (mooncake-reshard)
• Mooncake EP (mooncake-ep)
• Mooncake PG (mooncake-pg)
• Integration (mooncake-integration)
• P2P Store (mooncake-p2p-store)
• Python Wheel (mooncake-wheel)
• Common (mooncake-common)
• Mooncake RL (mooncake-rl)
• CI/CD
• Docs
• Other

Type of Change

• Bug fix
• New feature
• Refactor
• Breaking change
• Documentation update
• Performance improvement
• Other

How Has This Been Tested?

Manual verification on Ascend 910B (bare mooncake.engine TE path):

• Cross-card transfer runs: rdma path reaches 7.2 GB/s (1MB block × batch16 × 10
  rounds, all ok).
• With the alignment fix, the fallback allocator returns 64KB-aligned addresses and
  aclrtHostRegister no longer fails with EINVAL.
• The wildcard fallback fix follows the same pattern already merged for the
  heterogeneous-RDMA transport (fix: fix heterogeneous rdma transport error #1657).

Test commands:

# Manual verification on Ascend 910B

Test results:

• Unit tests pass
• Integration tests pass (if applicable)
• Manual testing done (describe below)

Checklist

• I have performed a self-review of my own code
• I have formatted my code using ./scripts/code_format.sh
• I have run pre-commit on the files changed in this PR and all hooks pass
• I have updated the documentation (if applicable)
• I have added tests to prove my changes are effective
• For changes >500 LOC: I have filed an RFC issue

AI Assistance Disclosure

• No AI tools were used
• AI tools were used (specify below)

[gygdh-001]

Superseded - split into #4056 (wildcard location probe fallback) and #4057 (64KB alignment).