feat(ses): auto setting for DMARC

[watany-dev]

Introducing DMARC functionality to Amazon SES Construct to enhance email security by authenticating sender identity. This feature allows users to enable DMARC for their email domains with minimal configuration.

• Changes
  Added autoDmarc flag in EmailIdentity for automatic DMARC TXT record creation.
  Optional dmarcReportEmail for custom DMARC report destination.

• Example

new ses.EmailIdentity(this, 'Identity', {
  identity: ses.Identity.publicHostedZone(myHostedZone),
  autoDmarc: true,
  dmarcReportEmail: 'custom-report@domain.com',
});

• Impact
  Facilitates easy DMARC setup for Amazon SES users, enhancing domain security against email spoofing.
  https://support.google.com/a/answer/2466580

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[watany-dev]

The integ test should have passed locally.

[kaizencc]

just one comment @watany-dev, which should also have its own unit test, and then we are good to go. Thanks!

[kaizencc]

If props.dmarcReportEmail is set but props.autoDmarc is not, then the email will be ignored, which I argue is unexpected. Instead, we should assume that autoDmarc is true if dmarcReportEmail is set.

Pull request has been modified.

[kaizencc]

Looks good @watany-dev but looks like the integ test needs updating?

[aws-cdk-automation]

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[aws-cdk-automation]

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