Ensure tar installed in SDK for Mariner 2.0 (dotnet#4065)

(cherry picked from commit 676db0d)

eng/dockerfile-templates/sdk/Dockerfile.linux

@@ -23,7 +23,8 @@
         when(isMariner,
             [
                 "git",
-                when(dotnetVersion = "3.1", "procps-ng", "")
+                when(dotnetVersion = "3.1", "procps-ng", ""),
+                when(find(OS_VERSION, "1.0") < 0 && dotnetVersion = "6.0", "tar", "")
             ],
             [
                 "curl",

src/sdk/6.0/cbl-mariner2.0/amd64/Dockerfile

@@ -19,6 +19,7 @@ ENV \
 
 RUN tdnf install -y \
         git \
+        tar \
     && tdnf clean all
 
 # Install .NET SDK

src/sdk/6.0/cbl-mariner2.0/arm64v8/Dockerfile

@@ -19,6 +19,7 @@ ENV \
 
 RUN tdnf install -y \
         git \
+        tar \
     && tdnf clean all
 
 # Install .NET SDK

tests/Microsoft.DotNet.Docker.Tests/SdkImageTests.cs

@@ -246,6 +246,24 @@ public void VerifyGitInstallation(ProductImageData imageData)
             );
         }
 
+        /// <summary>
+        /// Verifies that a tar command can be executed without failure.
+        /// </summary>
+        [DotNetTheory]
+        [MemberData(nameof(GetImageData))]
+        public void VerifyTarInstallation(ProductImageData imageData)
+        {
+            if (imageData.Version.Major != 7)
+            {
+                // tar should exist in the SDK for both Linux and Windows. The --version option works in either OS
+                DockerHelper.Run(
+                    image: imageData.GetImage(DotNetImageType.SDK, DockerHelper),
+                    name: imageData.GetIdentifier("tar"),
+                    command: "tar --version"
+                );
+            }
+        }
+
         private IEnumerable<SdkContentFileInfo> GetActualSdkContents(ProductImageData imageData)
         {
             string dotnetPath;