fix: install requirements.txt in Windows build stage to fix psutil import error

Author: gargsaumya

OneBranchPipelines/stages/build-windows-single-stage.yml

@@ -131,7 +131,7 @@ stages:
               $ErrorActionPreference = "Stop"
               Write-Host "Installing Python dependencies..."
               python -m pip install --upgrade pip
-              python -m pip install setuptools wheel pybind11 pytest pyodbc
+              python -m pip install -r requirements.txt pyodbc
               Write-Host "Dependencies installed successfully"
             displayName: 'Install Python dependencies'