Enable MSVC support for AArch64 code paths

[Harishmcw]

Summary

• This PR improves MSVC compatibility for Windows on Arm64 by extending AArch64-specific code paths to also recognize _M_ARM64.
• The changes ensure that ARM64-specific declarations, lookup table types, and rounding policy selection are consistently enabled across Clang/GCC and MSVC builds.

Motivation

• While building OpenVINO for Windows on Arm64 using MSVC, several compilation failures and runtime crashes were encountered in ARM Compute Library due to ARM64-specific code being guarded only by aarch64.
• MSVC defines _M_ARM64 instead of aarch64, causing those code paths to be excluded.

This resulted in compilation errors such as:

error C2039: 'NEReorderLayer': is not a member of 'arm_compute'
error C3646: unknown override specifier
error C4430: missing type specifier

Fix

This PR updates ARM64-specific code paths to support both GCC/Clang and MSVC by replacing architecture guards of the form:

#ifdef __aarch64__

with

#if defined(__aarch64__) || defined(_M_ARM64)

The changes include:

1. ActivationLayerInfo.h

   • Enables ARM64-specific members when compiling with MSVC.
   • Introduces an MSVC-compatible float16_t alias using uint16_t as a binary-compatible 2-byte type. This preserves the ActivationLayerInfo layout across Clang and MSVC builds, preventing ABI mismatches.

2. LUTManager.h

   • Enables ARM64 lookup table definitions for MSVC, ensuring consistent lookup table types across toolchains.

3. QuantizationInfo.h

   • Applies the ARM64 rounding policy for MSVC builds, matching the existing AArch64 behaviour.

4. NEReorderLayer.h

   • Makes NEReorderLayer available when compiling with MSVC by enabling the ARM64 code path for _M_ARM64.

These changes ensure that both Clang/GCC and MSVC compile the same ARM64 code paths, providing consistent declarations, structure layouts, and behaviour across toolchains.