mach (Windows): make vswhere.exe work properly (#38028)

Previously, the args passed to `vswhere.exe` was wrong. There is no
generic component ID called
`Microsoft.VisualStudio.Component.Windows10SDK`, but always something
like `Microsoft.VisualStudio.Component.Windows10SDK.19041` /
`Microsoft.VisualStudio.Component.Windows11SDK.22621`.
That's why users always had to manually setup environment variable
`VSINSTALLDIR`, `VisualStudioVersion`.

This QoL PR also makes `mach` compatible with Windows 11 SDK, and update
README.md to be consistent with https://github.com/servo/book/pull/92.

Testing: Tested locally and working fine after removing environment
variables.

---------

Signed-off-by: Euclid Ye <yezhizhenjiakang@gmail.com>
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@ -50,7 +50,7 @@ For more detailed build instructions, see the Servo book under [Setting up your
- Download [`uv`](https://docs.astral.sh/uv/getting-started/installation/#standalone-installer), [`choco`](https://chocolatey.org/install#individual), and [`rustup`](https://win.rustup.rs/)
- Be sure to select *Quick install via the Visual Studio Community installer*
- In the Visual Studio Installer, ensure the following components are installed:
- **Windows 10 SDK (10.0.19041.0)** (`Microsoft.VisualStudio.Component.Windows10SDK.19041`)
- **Windows 10/11 SDK (anything >= 10.0.19041.0)** (`Microsoft.VisualStudio.Component.Windows{10, 11}SDK.{>=19041}`)
- **MSVC v143 - VS 2022 C++ x64/x86 build tools (Latest)** (`Microsoft.VisualStudio.Component.VC.Tools.x86.x64`)
- **C++ ATL for latest v143 build tools (x86 & x64)** (`Microsoft.VisualStudio.Component.VC.ATL`)
- **C++ MFC for latest v143 build tools (x86 & x64)** (`Microsoft.VisualStudio.Component.VC.ATLMFC`)