Increase timeout on flaky SQS test (#43672) (#43692)

`TestCancelWithGrace` in `sqs_test.go` has a timer correctness margin of only 5ms. This is much too low for a reliable test, timers are not guaranteed to have that granularity (especially on CI nodes where there are often execution delays). I saw it "failing" a couple times because it expected a duration of 1.0 seconds and instead got 1.006. This PR increases the acceptable margin to 50ms instead of 5.

Closes #43668.

(cherry picked from commit 7a95d64)

# Conflicts:
#	x-pack/filebeat/input/awss3/sqs_test.go

Co-authored-by: Fae Charlton <[email protected]>

Author: mergify[bot]

x-pack/filebeat/input/awss3/sqs_test.go

@@ -292,7 +292,7 @@ func TestCancelWithGrace(t *testing.T) {
 	const (
 		wait    = time.Second
 		tooLong = time.Second
-		tol     = 10 * time.Millisecond
+		tol     = 100 * time.Millisecond
 	)
 	parentCtx, parentCancel := context.WithCancel(context.Background())
 	childCtx, childCancel := cancelWithGrace(parentCtx, wait)