Sweepers: Extend CloudWatch Events sweepers to support custom Event Buses

[gdavison]

Because the CloudWatch Events/EventBridge Bus, Permission, Rule, and Target resources are nested, all four need to support custom event buses before sweeping can be implemented for resources using a custom event bus

Affected Resource

• aws_cloudwatch_event_bus
• aws_cloudwatch_event_permission
• aws_cloudwatch_event_rule
• aws_cloudwatch_event_target

References

• Amazon EventBridge #9330
• Add resource aws_cloudwatch_event_bus #10256
• Add event_bus_name to aws_cloudwatch_event_rule #12886 (Add eventbus to cloudwatch event rule #15727)
• Add event_bus_name to aws_cloudwatch_event_target #12887 (Add eventbus to cloudwatch event target #15799)
• Adds custom event bus support to EventBridge permission resource #15922

[github-actions]

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[github-actions]

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