ci(package): constrain Agent MSI regeneration to windows/x86_64 artifacts

The Regenerate Agent MSI step defaults to x86_64 (tlk.ps1 architecture
default) but was searching recursively across both arm64 and x86_64
directories, leaving the executable selection to chance via Select -First 1.

Introduce an $x64Root variable pointing to windows\x86_64 and scope all
per-architecture file lookups to that path. tun2socks and wintun are kept
with a recursive search on the full PackageRoot since they live under a
separate tun2socks\ subdirectory.

Author: CBenoit

.github/workflows/package.yml

@@ -472,13 +472,14 @@ jobs:
         if: ${{ matrix.project == 'devolutions-agent' && matrix.os == 'windows' }}
         run: |
           $PackageRoot = Join-Path ${{ runner.temp }} ${{ matrix.project}}
+          $x64Root = Join-Path $PackageRoot windows x86_64
 
-          $Env:DAGENT_EXECUTABLE = Get-ChildItem -Path $PackageRoot -Recurse -Include '*DevolutionsAgent_*.exe' | Select -First 1
-          $Env:DAGENT_UPDATER_EXECUTABLE = Get-ChildItem -Path $PackageRoot -Recurse -Include 'DevolutionsAgentUpdater_*.exe' | Select -First 1
+          $Env:DAGENT_EXECUTABLE = Get-ChildItem -Path $x64Root -Include '*DevolutionsAgent_*.exe' | Select -First 1
+          $Env:DAGENT_UPDATER_EXECUTABLE = Get-ChildItem -Path $x64Root -Include 'DevolutionsAgentUpdater_*.exe' | Select -First 1
           $Env:DAGENT_DESKTOP_AGENT_PATH = Resolve-Path -Path "devolutions-pedm-desktop"
-          $Env:DAGENT_PEDM_SHELL_EXT_DLL = Get-ChildItem -Path $PackageRoot -Recurse -Include 'DevolutionsPedmShellExt.dll' | Select -First 1
-          $Env:DAGENT_PEDM_SHELL_EXT_MSIX = Get-ChildItem -Path $PackageRoot -Recurse -Include 'DevolutionsPedmShellExt.msix' | Select -First 1
-          $Env:DAGENT_SESSION_EXECUTABLE = Get-ChildItem -Path $PackageRoot -Recurse -Include 'DevolutionsSession.exe' | Select -First 1
+          $Env:DAGENT_PEDM_SHELL_EXT_DLL = Get-ChildItem -Path $x64Root -Include 'DevolutionsPedmShellExt.dll' | Select -First 1
+          $Env:DAGENT_PEDM_SHELL_EXT_MSIX = Get-ChildItem -Path $x64Root -Include 'DevolutionsPedmShellExt.msix' | Select -First 1
+          $Env:DAGENT_SESSION_EXECUTABLE = Get-ChildItem -Path $x64Root -Include 'DevolutionsSession.exe' | Select -First 1
           $Env:DAGENT_TUN2SOCKS_EXE = Get-ChildItem -Path $PackageRoot -Recurse -Include 'tun2socks.exe' | Select -First 1
           $Env:DAGENT_WINTUN_DLL = Get-ChildItem -Path $PackageRoot -Recurse -Include 'wintun.dll' | Select -First 1