e2e: use error wrapping with %w

The recently introduced failure handling in ExpectNoError depends on error
wrapping: if an error prefix gets added with `fmt.Errorf("foo: %v", err)`, then
ExpectNoError cannot detect that the root cause is an assertion failure and
then will add another useless "unexpected error" prefix and will not dump the
additional failure information (currently the backtrace inside the E2E
framework).

Instead of manually deciding on a case-by-case basis where %w is needed, all
error wrapping was updated automatically with

    sed -i "s/fmt.Errorf\(.*\): '*\(%s\|%v\)'*\",\(.* err)\)/fmt.Errorf\1: %w\",\3/" $(git grep -l 'fmt.Errorf' test/e2e*)

This may be unnecessary in some cases, but it's not wrong.

test/e2e/upgrades/apps/deployments.go

@@ -184,7 +184,7 @@ func waitForDeploymentRevision(ctx context.Context, c clientset.Interface, d *ap
 		return revision == targetRevision, nil
 	})
 	if err != nil {
-		return fmt.Errorf("error waiting for revision to become %q for deployment %q: %v", targetRevision, d.Name, err)
+		return fmt.Errorf("error waiting for revision to become %q for deployment %q: %w", targetRevision, d.Name, err)
 	}
 	return nil
 }

test/e2e/upgrades/auth/serviceaccount_admission_controller_migration.go

@@ -100,7 +100,7 @@ func inClusterClientMustWork(ctx context.Context, f *framework.Framework, pod *v
 		numTokens, err := e2eauth.ParseInClusterClientLogs(logs)
 		if err != nil {
 			framework.Logf("Error parsing inclusterclient logs: %v", err)
-			return false, fmt.Errorf("inclusterclient reported an error: %v", err)
+			return false, fmt.Errorf("inclusterclient reported an error: %w", err)
 		}
 		if numTokens == 0 {
 			framework.Logf("No authenticated API calls found")

test/e2e/upgrades/network/kube_proxy_migration.go

@@ -143,7 +143,7 @@ func waitForKubeProxyStaticPodsRunning(ctx context.Context, c clientset.Interfac
 	}
 
 	if err := wait.PollImmediate(5*time.Second, defaultTestTimeout, condition); err != nil {
-		return fmt.Errorf("error waiting for kube-proxy static pods running: %v", err)
+		return fmt.Errorf("error waiting for kube-proxy static pods running: %w", err)
 	}
 	return nil
 }
@@ -166,7 +166,7 @@ func waitForKubeProxyStaticPodsDisappear(ctx context.Context, c clientset.Interf
 	}
 
 	if err := wait.PollImmediate(5*time.Second, defaultTestTimeout, condition); err != nil {
-		return fmt.Errorf("error waiting for kube-proxy static pods disappear: %v", err)
+		return fmt.Errorf("error waiting for kube-proxy static pods disappear: %w", err)
 	}
 	return nil
 }
@@ -190,7 +190,7 @@ func waitForKubeProxyDaemonSetRunning(ctx context.Context, f *framework.Framewor
 	}
 
 	if err := wait.PollImmediate(5*time.Second, defaultTestTimeout, condition); err != nil {
-		return fmt.Errorf("error waiting for kube-proxy DaemonSet running: %v", err)
+		return fmt.Errorf("error waiting for kube-proxy DaemonSet running: %w", err)
 	}
 	return nil
 }
@@ -213,7 +213,7 @@ func waitForKubeProxyDaemonSetDisappear(ctx context.Context, c clientset.Interfa
 	}
 
 	if err := wait.PollImmediate(5*time.Second, defaultTestTimeout, condition); err != nil {
-		return fmt.Errorf("error waiting for kube-proxy DaemonSet disappear: %v", err)
+		return fmt.Errorf("error waiting for kube-proxy DaemonSet disappear: %w", err)
 	}
 	return nil
 }