Make it possible to keep container logs around for longer than a day

[mmdriley]

The log group we create for a cloud.Service in AWS always has a retention of 1 day:

pulumi-cloud/aws/service.ts

Lines 451 to 454 in 9c81b0b

	// Create a single log group for all logging associated with the Service
	const logGroup = new aws.cloudwatch.LogGroup(name, {
	retentionInDays: 1,
	}, { parent: parent });

We chose a small value because these logs were also diverted to a log collector lambda:

pulumi-cloud/aws/service.ts

Lines 443 to 448 in dd812cb

	// And hook it up to the aggregated log collector
	const subscriptionFilter = new aws.cloudwatch.LogSubscriptionFilter(name, {
	logGroup: logGroup,
	destinationArn: getLogCollector().arn,
	filterPattern: "",
	}, { parent: parent });

But we removed that in #474.