Increase maximum number of tries in WaitForTracingPolicy

After merging #2506 it seems that
there are cases where 10 * 1 sec is not enough when waiting for a
tracing policy to load (mainly in e2e tests).

This patch increases that to 20 * 1 sec to avoid timeouts.

Signed-off-by: Anastasios Papagiannis <[email protected]>

tests/e2e/helpers/grpc/grpc.go

@@ -24,7 +24,7 @@ func WaitForTracingPolicy(ctx context.Context, policyName string) error {
 		return fmt.Errorf("failed to find tetragon grpc forwarded ports")
 	}
 
-	maxTries := 10
+	maxTries := 20
 	for podName, grpcPort := range tetraPorts {
 		addr := fmt.Sprintf("127.0.0.1:%d", grpcPort)
 		// NB(kkourt): maybe it would make sense to cache the grpc connections in the