E2E: extend timeout on CSI snapshot test (#19338)

The EBS snapshot operation can take a long time to complete. Recent runs have
shown we sometimes get up to the 10s timeout on the context we're giving the CLI
command. Extend this so that we're not getting spurious timeouts.

Fixes: https://github.com/hashicorp/nomad/issues/19118

e2e/csi/ebs.go

@@ -4,7 +4,9 @@
 package csi
 
 import (
+	"context"
 	"fmt"
+	"os/exec"
 	"time"
 
 	"github.com/hashicorp/nomad/e2e/e2eutil"
@@ -195,8 +197,12 @@ func (tc *CSIControllerPluginEBSTest) TestVolumeClaim(f *framework.F) {
 // TestSnapshot exercises the snapshot commands.
 func (tc *CSIControllerPluginEBSTest) TestSnapshot(f *framework.F) {
 
-	out, err := e2eutil.Command("nomad", "volume", "snapshot", "create",
-		tc.volumeIDs[0], "snap-"+tc.uuid)
+	// EBS snapshots can take a very long time to run
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
+	defer cancel()
+	bytes, err := exec.CommandContext(ctx, "nomad", "volume", "snapshot", "create",
+		tc.volumeIDs[0], "snap-"+tc.uuid).CombinedOutput()
+	out := string(bytes)
 	requireNoErrorElseDump(f, err, "could not create volume snapshot", tc.pluginJobIDs)
 
 	snaps, err := e2eutil.ParseColumns(out)