patch to fix faulty import statements

[johnricords]

import statement for event_rule_targets is prefixing the name, generating a "/" in the ID

module.cloudwatch_custom_bus["s3-object-created-rule"].aws_cloudwatch_event_target.this["target1"]: Preparing import... [id=custom-bus/s3-object-created-rule/Ida13e361a-e8eb-4acc-ac6d-da5d0bb94833]
module.cloudwatch_custom_bus["s3-object-created-rule"].aws_cloudwatch_event_target.this["target1"]: Refreshing state... [id=custom-bus-s3-object-created-rule-Ida13e361a-e8eb-4acc-ac6d-da5d0bb94833]

this result in an regex validation error for / for the rule attr

 Error: "rule" doesn't comply with restrictions ("^[0-9A-Za-z_.-]+$"): "data-pipeline-bus/s3-object-created-rule"
│ 
│   with module.cloudwatch_custom_bus["s3-object-created-rule"].aws_cloudwatch_event_target.this["target1"],
│   on .terraform/modules/cloudwatch_data_pipeline/main.tf line 16, in resource "aws_cloudwatch_event_target" "this":
│   16:   rule           = aws_cloudwatch_event_rule.this.id