disable gravatar in test (#32529)

When running e2e tests on flaky networks, gravatar can cause a timeout
and test failures. Turn off, and populate avatars on e2e test suite run
to make them reliable.

tests/e2e/e2e_test.go

@@ -107,7 +107,7 @@ func TestE2e(t *testing.T) {
 				cmd.Stdout = &stdout
 				cmd.Stderr = &stderr
 
-				err := cmd.Run()
+				err = cmd.Run()
 				if err != nil {
 					// Currently colored output is conflicting. Using Printf until that is resolved.
 					fmt.Printf("%v", stdout.String())