sweeper/aws_cur_report_definition: Checks for region support

[gdavison]

In some regions where CUR was not supported, such as us-east-2, the error RequestError is returned, which will cause the sweeper to skip.

In other regions where it is not supported, such as us-west-2, the error is ThrottlingException instead.

This PR now checks for the existence of a CUR endpoint and skips if the region does not support CUR.

Output from acceptance testing:

$ make sweep SWEEPARGS=-sweep-run=aws_cur_report_definition

2021/07/23 11:59:31 [DEBUG] Running Sweepers for region (us-east-1):
2021/07/23 11:59:31 [DEBUG] Running Sweeper (aws_cur_report_definition) in region (us-east-1)
2021/07/23 11:59:33 [DEBUG] Completed Sweeper (aws_cur_report_definition) in region (us-east-1) in 2.455980495s
2021/07/23 11:59:33 Completed Sweepers for region (us-east-1) in 2.456235699s
2021/07/23 11:59:33 Sweeper Tests for region (us-east-1) ran successfully:
	- aws_cur_report_definition
2021/07/23 11:59:33 [DEBUG] Running Sweepers for region (us-east-2):
2021/07/23 11:59:33 [DEBUG] Running Sweeper (aws_cur_report_definition) in region (us-east-2)
2021/07/23 11:59:34 [WARN] Skipping Cost and Usage Report Definitions sweep for us-east-2: CUR not supported in this region
2021/07/23 11:59:34 [DEBUG] Completed Sweeper (aws_cur_report_definition) in region (us-east-2) in 1.284317519s
2021/07/23 11:59:34 Completed Sweepers for region (us-east-2) in 1.284335761s
2021/07/23 11:59:34 Sweeper Tests for region (us-east-2) ran successfully:
	- aws_cur_report_definition
2021/07/23 11:59:34 [DEBUG] Running Sweepers for region (us-west-2):
2021/07/23 11:59:34 [DEBUG] Running Sweeper (aws_cur_report_definition) in region (us-west-2)
2021/07/23 11:59:36 [WARN] Skipping Cost and Usage Report Definitions sweep for us-west-2: CUR not supported in this region
2021/07/23 11:59:36 [DEBUG] Completed Sweeper (aws_cur_report_definition) in region (us-west-2) in 1.740692215s
2021/07/23 11:59:36 Completed Sweepers for region (us-west-2) in 1.740708271s
2021/07/23 11:59:36 Sweeper Tests for region (us-west-2) ran successfully:
	- aws_cur_report_definition

[ewbankkit]

LGTM 🚀.

[github-actions]

This functionality has been released in v3.52.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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