fix(cloudformation): handle stackset updates with OU and multiple OU targets

[nomeelnoj]

Signed-off-by: Jon Leemon <[email protected]

Description

Updates the cloudformation stack set code to properly handle updates when deployed to one or more OUs instead of accounts.

Relations

Closes #40675

References

Output from Acceptance Testing

% make testacc TESTS=TestAccXXX PKG=ec2

...

[github-actions]

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[github-actions]

Welcome @nomeelnoj 👋

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