Add templates for installing the 32 bit .NET SDKs

Install the x86 SDKs in Windows integration tests

.azure-pipelines/steps/install-dotnet-5-sdk.yml

@@ -1,7 +1,17 @@
+parameters:
+  - name: includeX86
+    type: boolean
+    default: false
+
 steps:
 - task: UseDotNet@2
   displayName: install dotnet core sdk 5
   inputs:
     packageType: sdk
     version: $(dotnetCoreSdk5Version)
-    includePreviewVersions: true
+    includePreviewVersions: true
+
+- ${{ if eq(parameters.includeX86, true) }}:
+    - template: install-dotnet-sdk-32bit.yml
+      parameters:
+        sdkVersion: $(dotnetCoreSdk5Version)

.azure-pipelines/steps/install-dotnet-sdk-32bit.yml

@@ -0,0 +1,30 @@
+parameters:
+  - name: sdkVersion
+    type: string
+    default: ''
+
+  - name: channel
+    type: string
+    default: ''
+
+steps:
+  - ${{if ne(parameters.sdkVersion, '') }}:
+    - powershell: |
+        echo "Downloading dotnet-install.ps1"
+        Invoke-WebRequest -Uri "https://dot.net/v1/dotnet-install.ps1" -OutFile dotnet-install.ps1
+        $path = "C:\Users\VssAdministrator\AppData\Local\Microsoft\dotnet_32"
+        echo "Installing dotnet (x86) to $path"
+        ./dotnet-install.ps1 -version ${{ parameters.sdkVersion }} -Architecture x86 -NoPath -InstallDir $path
+        echo "Exporting path to DOTNET_EXE_32"
+        echo "##vso[task.setvariable variable=DOTNET_EXE_32]$path\dotnet.exe"
+      displayName: install dotnet core sdk ${{ parameters.sdkVersion }} (x86)
+  - ${{if ne(parameters.channel, '') }}:
+    - powershell: |
+        echo "Downloading dotnet-install.ps1"
+        Invoke-WebRequest -Uri "https://dot.net/v1/dotnet-install.ps1" -OutFile dotnet-install.ps1
+        $path = "C:\Users\VssAdministrator\AppData\Local\Microsoft\dotnet_32"
+        echo "Installing dotnet (x86) to $path"
+        ./dotnet-install.ps1 -Channel ${{ parameters.channel }} -Architecture x86 -NoPath -InstallDir $path
+        echo "Exporting path to DOTNET_EXE_32"
+        echo "##vso[task.setvariable variable=DOTNET_EXE_32]$path\dotnet.exe"
+      displayName: install dotnet core sdk ${{ parameters.channel }} (x86)

.azure-pipelines/steps/install-dotnet-sdks.yml

@@ -1,3 +1,8 @@
+parameters:
+  - name: includeX86
+    type: boolean
+    default: false
+
 steps:
 - task: UseDotNet@2
   displayName: install dotnet core sdk 2.1
@@ -22,4 +27,18 @@ steps:
   inputs:
     packageType: sdk
     version: $(dotnetCoreSdk5Version)
-    includePreviewVersions: true
+    includePreviewVersions: true
+
+- ${{ if eq(parameters.includeX86, true) }}:
+    - template: install-dotnet-sdk-32bit.yml
+      parameters:
+        channel: 2.1
+    - template: install-dotnet-sdk-32bit.yml
+      parameters:
+        channel: 3.0
+    - template: install-dotnet-sdk-32bit.yml
+      parameters:
+        channel: 3.1
+    - template: install-dotnet-sdk-32bit.yml
+      parameters:
+        sdkVersion: $(dotnetCoreSdk5Version)

.azure-pipelines/ultimate-pipeline.yml

@@ -312,6 +312,8 @@ stages:
 
     steps:
     - template: steps/install-dotnet-sdks.yml
+      parameters:
+        includeX86: true
     - template: steps/restore-working-directory.yml
 
     - powershell: |
@@ -353,6 +355,8 @@ stages:
     steps:
 
     - template: steps/install-dotnet-sdks.yml
+      parameters:
+        includeX86: true
     - template: steps/restore-working-directory.yml
 
     - task: DownloadPipelineArtifact@2