HttpStress: Disable firewall in Windows runs (#52381)

#50854 seems to be rooted in an unknown firewall problem, and from the POV of http stress testing it's a false negative. We need a quick solution to remove this failure type, because the high amount failures renders our stress test reports useless. Since the build agents do not have a public IP, it seems OK to disable the Windows firewall for the runs.

eng/pipelines/libraries/stress/http.yml

@@ -96,10 +96,22 @@ jobs:
     displayName: Run HttpStress - HTTP 2.0
     condition: and(eq(variables['buildRuntime.succeeded'], 'true'), eq(variables['buildStress.succeeded'], 'true'))
 
+    # Firewall is disabled for HTTP 1.1 runs.
+    # See: https://github.com/dotnet/runtime/issues/50854
+  - powershell: |
+      Set-NetFirewallProfile -Profile Domain, Public, Private -Enabled False
+    name: disableFirewall
+    displayName: Disable Firewall
+
   - powershell: |
       cd '$(httpStressProject)'
       $env:HTTPSTRESS_CLIENT_ARGS = "$env:HTTPSTRESS_CLIENT_ARGS -http 1.1"
       $env:HTTPSTRESS_SERVER_ARGS = "$env:HTTPSTRESS_SERVER_ARGS -http 1.1"
       docker-compose up --abort-on-container-exit --no-color
     displayName: Run HttpStress - HTTP 1.1
-    condition: and(eq(variables['buildRuntime.succeeded'], 'true'), eq(variables['buildStress.succeeded'], 'true'))
+    condition: and(eq(variables['buildRuntime.succeeded'], 'true'), eq(variables['buildStress.succeeded'], 'true'))
+
+  - powershell: |
+      Set-NetFirewallProfile -Profile Domain, Public, Private -Enabled True
+    name: enableFirewall
+    displayName: Enable Firewall