[NETSDKE2E][Regression] Failed to install NET11 RC2 SDK in a custom location.

### Regression Info
Not repro on 11.0.100-rc.1.26425.128

### Describe the bug

NET11 RC2 SDK cannot been installed in a custom location.

### Steps to reproduce

1. Clean win-x64 machine
2. Install 11.0.100-rc.2.26452.108-win-x64.exe in a custom location
`dotnet-sdk-11.0.100-rc.2.26452.108-win-x64.exe /install DOTNETHOME_X64="C:\dotnet\x64" DOTNETHOME_X86="C:\dotnet\x86" /log "installation.log" /quiet /norestart`
4. Check the sdk was installed in custom location

### Expected behavior

SDK installed in custom location successfully.

### Actual behavior

SDK was installed in %ProgramFiles% instead of custom location.

### Is this a regression?

Not repro on 11.0.100-rc.1.26425.128

### Are there any workarounds?

No

### dotnet --info output

```console
.NET SDK:
Version: 11.0.100-rc.2.26452.108
Commit: 4ecf58080c
Workload version: 11.0.100-manifests.ba4b9bda
MSBuild version: 18.12.0-1.26452.108+4ecf58080

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26200
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\11.0.100-rc.2.26452.108

.NET workloads installed:
There are no installed workloads to display.
Configured to use workload sets when installing new manifests.
No workload sets are installed. Run "dotnet workload restore" to install a workload set.

Host:
Version: 11.0.0-rc.2.26452.108
Architecture: x64
Commit: 4ecf58080c

.NET SDKs installed:
11.0.100-rc.2.26452.108 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 11.0.0-rc.2.26452.108 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 11.0.0-rc.2.26452.108 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 11.0.0-rc.2.26452.108 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
None

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download
```

### IDE version

_No response_

### Other details
Preconditions:
Visual Studio is not installed
There are no SDKs on the machine
The file: %ProgramFiles%\dotnet\dotnet.exe does not exist
The file: %ProgramFiles(x86)%\dotnet\dotnet.exe does not exist
The following reg keys do not exist:
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\dotnet\Setup\InstalledVersions\x64\sdk\InstallLocation
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\dotnet\Setup\InstalledVersions\x86\sdk\InstallLocation

Start by reproducing the issue with dotnet-sdk-11.0.100-rc.2.26452.108-win-x64.exe and the documented /install command using DOTNETHOME_X64 and DOTNETHOME_X86. Inspect where the installer places the SDK and how the listed registry keys and existing Program Files paths affect that choice. Done means a clean Windows machine installs the SDK in both requested custom locations.

Written by the indexing model from the issue text.