Add task to install dotnet sdk (#2376)

vsts/pipelines/templates/_releaseJobTemplate.yml

@@ -9,6 +9,11 @@ jobs:
     skipComponentGovernanceDetection: true
   timeoutInMinutes: 300
   steps:
+  - task: UseDotNet@2
+    displayName: 'Use .NET Core sdk 7.x'
+    inputs:
+      version: 7.0.306
+
   - script: |
       echo "##vso[task.setvariable variable=ReleaseBuildImages;]true"
       echo "##vso[task.setvariable variable=ReleaseRuntimeImages;]false"

vsts/pipelines/templates/_releaseStepTemplate.yml

@@ -114,27 +114,6 @@ steps:
     scriptPath: ./vsts/scripts/tagBuilderImagesForRelease.sh
   condition: and(succeeded(), eq(variables['ReleaseBuildImages'], 'true'))
 
-- script: |
-    dotnet --version
-    if [ $? -ne 0 ]; then
-      echo "Failed to check dotnet version. Assuming not installed."
-    fi
-    # Check for installed .NET 7.x using package manager
-    dpkg --list | grep 'dotnet-sdk-7\.'
-    if [ $? -ne 0 ]; then
-      echo "dotnet 7.x is not installed. Installing..."
-      # Update package list and install .NET 7.x SDK
-      sudo apt-get update
-      sudo apt-get install -y dotnet-sdk-7.0
-    fi
-    # Check if dotnet is present in the PATH
-    echo "$PATH"
-    # try adding dotnet to path
-    export PATH=$PATH:/usr/bin/dotnet
-    # Check if it is in PATH now
-    dotnet --list-sdks
-  displayName: 'Install Dotnet SDK 7 if not installed'
-
 - task: ShellScript@2
   displayName: 'Test runtime images for pme staging registry'
   inputs: