test: .NET 8 container test now tests a 2.x.x version of EnyimMemcachedCore (#3513)

Author: tippmar-nr

build/Dotty/packageInfo.json

@@ -69,7 +69,9 @@
         "ignoreReason": "Breaking since 8.16.0. See https://new-relic.atlassian.net/browse/NR-356677"
     },
     {
-        "packageName": "enyimmemcachedcore"
+        "packageName": "enyimmemcachedcore",
+        "ignoreTFMs": "net8.0",
+        "ignoreReason": "net8.0 tests 2.x.x version"
     },
     {
         "packageName": "log4net"

tests/Agent/IntegrationTests/ContainerApplications/MemcachedTestApp/MemcachedTestApp.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.22.1" />
-    <PackageReference Include="EnyimMemcachedCore" Version="3.4.7" Condition="'$(TargetFramework)' == 'net8.0'" />
+    <PackageReference Include="EnyimMemcachedCore" Version="2.1.9" Condition="'$(TargetFramework)' == 'net8.0'" />
     <PackageReference Include="EnyimMemcachedCore" Version="3.4.7" Condition="'$(TargetFramework)' == 'net10.0'" />
     <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.14.15">
       <PrivateAssets>all</PrivateAssets>