[chore][receiver/hostmetrics] increase timeout to avoid test flakyness (open-telemetry#44059)

<!-- Issue number (e.g. open-telemetry#1234) or full URL to issue, if applicable. -->
#### Link to tracking issue
Fixes open-telemetry#43923

Reasoning
[here](open-telemetry#43923 (comment))

Signed-off-by: odubajDT <[email protected]>

Author: odubajDT

receiver/hostmetricsreceiver/hostmetrics_receiver_test.go

@@ -118,8 +118,8 @@ func TestGatherMetrics_EndToEnd(t *testing.T) {
 	// canceling the context provided to Start should not cancel any async processes initiated by the receiver
 	cancelFn()
 
-	const tick = 50 * time.Millisecond
-	const waitFor = 10 * time.Second
+	const tick = 200 * time.Millisecond
+	const waitFor = 30 * time.Second
 	require.Eventuallyf(t, func() bool {
 		got := sink.AllMetrics()
 		if len(got) == 0 {