chore(elasticloadbalancingv2): add details about Network Load Balancer and EC2 IConnectable interface.

[ashishdhingra]

Issue # (if applicable)

Closes #31644.

Reason for this change

User reported that using connections with NLB without security group specified, doesn't create security group automatically. NLB do not have security groups, and no automatic security group configuration is done.

Description of changes

Add details about Network Load Balancer and EC2 IConnectable interface.

Description of how you validated changes

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

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Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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AWS CodeBuild CI Report

• CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
• Commit ID: a479ebb
• Result: SUCCEEDED
• Build Logs (available for 30 days)

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[mergify]

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

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