feat(ses): auto email validation for configuration sets

[badmintoncryer]

Issue # (if applicable)

None

Reason for this change

AWS SES configuration sets supports for auto email validation.
https://docs.aws.amazon.com/ses/latest/dg/email-validation-auto.html

Description of changes

• Introduced confidenceVerdictThreshold property in ConfigurationSet to manage suppression list validation.
• Added support for thresholds: DISABLED, MEDIUM, HIGH, and MANAGED.

This validation function is enabled by ConditionThresholdEnabled property. I decided to add DISABLED option for disable this feature explicitly.

function renderValidationOptions(threshold?: ConfidenceVerdictThreshold): CfnConfigurationSet.ValidationOptionsProperty | undefined {
  if (!threshold) {
    return undefined;
  }

  if (threshold === ConfidenceVerdictThreshold.DISABLED) {
    return {
      conditionThreshold: {
        conditionThresholdEnabled: 'DISABLED',
      },
    };
  }

  return {
    conditionThreshold: {
      conditionThresholdEnabled: 'ENABLED',
      overallConfidenceThreshold: {
        confidenceVerdictThreshold: threshold,
      },
    },
  };
}

Describe any new or updated permissions being added

None

Description of how you validated changes

Add both unit and integ tests.

Checklist

• My code adheres to the CONTRIBUTING GUIDE and DESIGN GUIDELINES

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

[github-actions]

⚠️ Experimental Feature: This security report is currently in experimental phase. Results may include false positives and the rules are being actively refined.
Please try merge from main to avoid findings unrelated to the PR.

---

	Tests	Passed ✅	Skipped	Failed
Security Guardian Results	48 ran	48 passed

Test	Result
No test annotations available

• View Security Guardian Results

[github-actions]

⚠️ Experimental Feature: This security report is currently in experimental phase. Results may include false positives and the rules are being actively refined.
Please try merge from main to avoid findings unrelated to the PR.

---

	Tests	Passed ✅	Skipped	Failed
Security Guardian Results with resolved templates	48 ran	48 passed

Test	Result
No test annotations available

• View Security Guardian Results with resolved templates

[lpizzinidev]

Ty!.

[badmintoncryer]

@lpizzinidev Thanks always!!