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.
This security report is NOT a review blocker. 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.
This security report is NOT a review blocker. 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!!