[REF-2676] Bun should not be used for ARM64 Windows

[masenf]

Describe the bug
Install the x86_64 version of python on ARM64 windows VM and it returns the machine architecture as AMD64 and thus tries to install and use bun.

To Reproduce
From M1 mac or similar, install parallels, windows 11, and x86 version of python.

Install reflex 0.4.9 and init/run a new project.

Note that bun is tried, fails, and falls back to npm

Expected behavior
On ARM64 processor, bun should not be used, regardless of what architecture the python interpreter is targeting.

Specifics (please complete the following information):

• Python Version: 3.11.2 (x86 version)
• Reflex Version: 0.4.9
• OS: Windows 11 (VM on macOS)

_REF-2676