VS Code very slow to install on Windows arm64 due to x86 emulation on the installer

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.140.0
• OS Version: Windows 11 25H2 arm64

Steps to Reproduce:

1. Download VS Code Windows arm64 installer from the VS Code website
2. Start the installer
3. Notice it takes much longer to install than a x64 machine, because the Inno Setup installer runs as a x86 executable:

x86 emulation on Windows arm64 is much slower than x64 emulation.

Inno Setup introduced a new field called SetupArchitecture=x64 in 7.0.0, which is opt-in and still defaults to SetupArchitecture=x86.

Please update the VS Code installer on Windows to also use SetupArchitecture=x64 on Windows x64 and arm64. Here's a PR of how we did it in Git for Windows for inspiration.

Given that VS Code doesn't seem to support 32-bit Windows anymore, just setting SetupArchitecture=x64 in code.iss should be enough, but I'm not sure if VS Code is already on Inno Setup v7.