win-dshow: Add support for installing virtualcam on WoA

[namoen0301]

Description

Add a new function in virtualcam-install.bat.in and virtualcam-uninstall.bat.in to support Windows on ARM install.

Motivation and Context

add a simple cpu target check in virtualcam-install.bat.

on x64 platform: Install 32bit and 64bit DLL.
on ARM64 platform: Install 32bit and ARM64 DLL.

virualcam-uninstall.bat will uninstall all virtualcam modules.

How Has This Been Tested?

test with my snapdragon laptop and UTM virtual machine on M3 Mac.

Types of changes

New feature (non-breaking change which adds functionality)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[WizardCM]

It's worth noting that by only installing the ARM64 DLL, the user will only get virtual camera support in native ARM64 apps.

[driver1998]

To properly support both ARM64 and x64 apps, the virtualcam DLL will need to be ARM64X (or a ARM64X redirector that redirects to either ARM64 or x64 DLL).

Because both ARM64 and x64 apps share the same registry view and therefore a single entry for COM component dll.

About ARM64X: https://learn.microsoft.com/en-us/windows/arm/arm64x-build

32-bit x86 apps are unaffected, those can be handled the same way as on x64 machines, just install and register the 32-bit dll the same way.

[namoen0301]

To properly support both ARM64 and x64 apps, the virtualcam DLL will need to be ARM64X (or a ARM64X redirector that redirects to either ARM64 or x64 DLL).

Because both ARM64 and x64 apps share the same registry view and therefore a single entry for COM component dll.

About ARM64X: https://learn.microsoft.com/en-us/windows/arm/arm64x-build

32-bit x86 apps are unaffected, those can be handled the same way as on x64 machines, just install and register the 32-bit dll the same way.

When I'm not busy, I'll look into this.

[namoen0301]

I think it needs to be split two separate PRs

1. Add support for installing virtualcam on WoA, I've added 32bit dll install on ARM64 platform.
2. Change obs-virtualcam-module-arm64.dll to ARM64X DLL