Add Red Hat base distro to supported list (#4946)

* Add Red Hat based distro (Oracle Linux) to supported list
* Fix FF using bug

Author: ismayilov-ismayil

src/Agent.Listener/net8.json

@@ -34,6 +34,14 @@
       }
     ]
   },
+  {
+    "id": "ol",
+    "versions": [
+      {
+        "name": "8+"
+      }
+    ]
+  },
   {
     "id": "macOS",
     "versions": [

src/Agent.Worker/JobExtension.cs

@@ -77,24 +77,27 @@ public async Task<List<IStep>> InitializeJob(IExecutionContext jobContext, Pipel
 
                     PackageVersion agentVersion = new PackageVersion(BuildConstants.AgentPackage.Version);
 
-                    // Check if a system supports .NET 8
-                    try
+                    if (!AgentKnobs.Net8UnsupportedOsWarning.GetValue(context).AsBoolean())
                     {
-                        Trace.Verbose("Checking if your system supports .NET 8");
+                        // Check if a system supports .NET 8
+                        try
+                        {
+                            Trace.Verbose("Checking if your system supports .NET 8");
 
-                        // Check version of the system
-                        if (!await PlatformUtil.IsNetVersionSupported("net8"))
+                            // Check version of the system
+                            if (!await PlatformUtil.IsNetVersionSupported("net8"))
+                            {
+                                string systemId = PlatformUtil.GetSystemId();
+                                SystemVersion systemVersion = PlatformUtil.GetSystemVersion();
+                                context.Warning(StringUtil.Loc("UnsupportedOsVersionByNet8", $"{systemId} {systemVersion}"));
+                            }
+                        }
+                        catch (Exception ex)
                         {
-                            string systemId = PlatformUtil.GetSystemId();
-                            SystemVersion systemVersion = PlatformUtil.GetSystemVersion();
-                            context.Warning(StringUtil.Loc("UnsupportedOsVersionByNet8", $"{systemId} {systemVersion}"));
+                            Trace.Error($"Error has occurred while checking if system supports .NET 8: {ex}");
+                            context.Warning(ex.Message);
                         }
                     }
-                    catch (Exception ex)
-                    {
-                        Trace.Error($"Error has occurred while checking if system supports .NET 8: {ex}");
-                        context.Warning(ex.Message);
-                    }
 
                     // Set agent version variable.
                     context.SetVariable(Constants.Variables.Agent.Version, BuildConstants.AgentPackage.Version);